jro_apps/redmine Commit - r13127:2d64a22dd928

Makes Project#assignable_users return a scope that prevents 2*n queries....

Jean-Philippe Lang -

r13127:2d64a22dd928

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r13127:2d64a22dd928

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app/models/issue.rb +1 -1

             # Redmine - project management software
             # Copyright (C) 2006-2014  Jean-Philippe Lang
             #
             # This program is free software; you can redistribute it and/or
             # modify it under the terms of the GNU General Public License
             # as published by the Free Software Foundation; either version 2
             # of the License, or (at your option) any later version.
             #
             # This program is distributed in the hope that it will be useful,
             # but WITHOUT ANY WARRANTY; without even the implied warranty of
             # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
             # GNU General Public License for more details.
             #
             # You should have received a copy of the GNU General Public License
             # along with this program; if not, write to the Free Software
             # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
             class Issue < ActiveRecord::Base
               include Redmine::SafeAttributes
               include Redmine::Utils::DateCalculation
               include Redmine::I18n
               belongs_to :project
               belongs_to :tracker
               belongs_to :status, :class_name => 'IssueStatus'
               belongs_to :author, :class_name => 'User'
               belongs_to :assigned_to, :class_name => 'Principal'
               belongs_to :fixed_version, :class_name => 'Version'
               belongs_to :priority, :class_name => 'IssuePriority'
               belongs_to :category, :class_name => 'IssueCategory'
               has_many :journals, :as => :journalized, :dependent => :destroy
               has_many :visible_journals,
                 lambda {where(["(#{Journal.table_name}.private_notes = ? OR (#{Project.allowed_to_condition(User.current, :view_private_notes)}))", false])},
                 :class_name => 'Journal',
                 :as => :journalized
               has_many :time_entries, :dependent => :destroy
               has_and_belongs_to_many :changesets, lambda {order("#{Changeset.table_name}.committed_on ASC, #{Changeset.table_name}.id ASC")}
               has_many :relations_from, :class_name => 'IssueRelation', :foreign_key => 'issue_from_id', :dependent => :delete_all
               has_many :relations_to, :class_name => 'IssueRelation', :foreign_key => 'issue_to_id', :dependent => :delete_all
               acts_as_nested_set :scope => 'root_id', :dependent => :destroy
               acts_as_attachable :after_add => :attachment_added, :after_remove => :attachment_removed
               acts_as_customizable
               acts_as_watchable
               acts_as_searchable :columns => ['subject', "#{table_name}.description", "#{Journal.table_name}.notes"],
                                  # sort by id so that limited eager loading doesn't break with postgresql
                                  :order_column => "#{table_name}.id",
                                  :scope => lambda { joins(:project).
                                                     joins("LEFT OUTER JOIN #{Journal.table_name} ON #{Journal.table_name}.journalized_type='Issue'" +
                                                           " AND #{Journal.table_name}.journalized_id = #{Issue.table_name}.id" +
                                                           " AND (#{Journal.table_name}.private_notes = #{connection.quoted_false}" +
                                                                 " OR (#{Project.allowed_to_condition(User.current, :view_private_notes)}))") }
               acts_as_event :title => Proc.new {|o| "#{o.tracker.name} ##{o.id} (#{o.status}): #{o.subject}"},
                             :url => Proc.new {|o| {:controller => 'issues', :action => 'show', :id => o.id}},
                             :type => Proc.new {|o| 'issue' + (o.closed? ? ' closed' : '') }
               acts_as_activity_provider :scope => preload(:project, :author, :tracker),
                                         :author_key => :author_id
               DONE_RATIO_OPTIONS = %w(issue_field issue_status)
               attr_reader :current_journal
               delegate :notes, :notes=, :private_notes, :private_notes=, :to => :current_journal, :allow_nil => true
               validates_presence_of :subject, :priority, :project, :tracker, :author, :status
               validates_length_of :subject, :maximum => 255
               validates_inclusion_of :done_ratio, :in => 0..100
               validates :estimated_hours, :numericality => {:greater_than_or_equal_to => 0, :allow_nil => true, :message => :invalid}
               validates :start_date, :date => true
               validates :due_date, :date => true
               validate :validate_issue, :validate_required_fields
               attr_protected :id
               scope :visible, lambda {|*args|
                 includes(:project).
                 references(:project).
                 where(Issue.visible_condition(args.shift || User.current, *args))
               }
               scope :open, lambda {|*args|
                 is_closed = args.size > 0 ? !args.first : false
                 joins(:status).
                 where("#{IssueStatus.table_name}.is_closed = ?", is_closed)
               }
               scope :recently_updated, lambda { order("#{Issue.table_name}.updated_on DESC") }
               scope :on_active_project, lambda {
                 joins(:project).
                 where("#{Project.table_name}.status = ?", Project::STATUS_ACTIVE)
               }
               scope :fixed_version, lambda {|versions|
                 ids = [versions].flatten.compact.map {|v| v.is_a?(Version) ? v.id : v}
                 ids.any? ? where(:fixed_version_id => ids) : where('1=0')
               }
               before_create :default_assign
               before_save :close_duplicates, :update_done_ratio_from_issue_status,
                           :force_updated_on_change, :update_closed_on, :set_assigned_to_was
               after_save {|issue| issue.send :after_project_change if !issue.id_changed? && issue.project_id_changed?}
               after_save :reschedule_following_issues, :update_nested_set_attributes,
                          :update_parent_attributes, :create_journal
               # Should be after_create but would be called before previous after_save callbacks
               after_save :after_create_from_copy
               after_destroy :update_parent_attributes
               after_create :send_notification
               # Keep it at the end of after_save callbacks
               after_save :clear_assigned_to_was
               # Returns a SQL conditions string used to find all issues visible by the specified user
               def self.visible_condition(user, options={})
                 Project.allowed_to_condition(user, :view_issues, options) do |role, user|
                   if user.id && user.logged?
                     case role.issues_visibility
                     when 'all'
                       nil
                     when 'default'
                       user_ids = [user.id] + user.groups.map(&:id).compact
                       "(#{table_name}.is_private = #{connection.quoted_false} OR #{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id IN (#{user_ids.join(',')}))"
                     when 'own'
                       user_ids = [user.id] + user.groups.map(&:id).compact
                       "(#{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id IN (#{user_ids.join(',')}))"
                     else
                       '1=0'
                     end
                   else
                     "(#{table_name}.is_private = #{connection.quoted_false})"
                   end
                 end
               end
               # Returns true if usr or current user is allowed to view the issue
               def visible?(usr=nil)
                 (usr || User.current).allowed_to?(:view_issues, self.project) do |role, user|
                   if user.logged?
                     case role.issues_visibility
                     when 'all'
                       true
                     when 'default'
                       !self.is_private? || (self.author == user || user.is_or_belongs_to?(assigned_to))
                     when 'own'
                       self.author == user || user.is_or_belongs_to?(assigned_to)
                     else
                       false
                     end
                   else
                     !self.is_private?
                   end
                 end
               end
               # Returns true if user or current user is allowed to edit or add a note to the issue
               def editable?(user=User.current)
                 user.allowed_to?(:edit_issues, project) || user.allowed_to?(:add_issue_notes, project)
               end
               def initialize(attributes=nil, *args)
                 super
                 if new_record?
                   # set default values for new records only
                   self.status ||= IssueStatus.default
                   self.priority ||= IssuePriority.default
                   self.watcher_user_ids = []
                 end
               end
               def create_or_update
                 super
               ensure
                 @status_was = nil
               end
               private :create_or_update
               # AR#Persistence#destroy would raise and RecordNotFound exception
               # if the issue was already deleted or updated (non matching lock_version).
               # This is a problem when bulk deleting issues or deleting a project
               # (because an issue may already be deleted if its parent was deleted
               # first).
               # The issue is reloaded by the nested_set before being deleted so
               # the lock_version condition should not be an issue but we handle it.
               def destroy
                 super
               rescue ActiveRecord::RecordNotFound
                 # Stale or already deleted
                 begin
                   reload
                 rescue ActiveRecord::RecordNotFound
                   # The issue was actually already deleted
                   @destroyed = true
                   return freeze
                 end
                 # The issue was stale, retry to destroy
                 super
               end
               alias :base_reload :reload
               def reload(*args)
                 @workflow_rule_by_attribute = nil
                 @assignable_versions = nil
                 @relations = nil
                 base_reload(*args)
               end
               # Overrides Redmine::Acts::Customizable::InstanceMethods#available_custom_fields
               def available_custom_fields
                 (project && tracker) ? (project.all_issue_custom_fields & tracker.custom_fields) : []
               end
               def visible_custom_field_values(user=nil)
                 user_real = user || User.current
                 custom_field_values.select do |value|
                   value.custom_field.visible_by?(project, user_real)
                 end
               end
               # Copies attributes from another issue, arg can be an id or an Issue
               def copy_from(arg, options={})
                 issue = arg.is_a?(Issue) ? arg : Issue.visible.find(arg)
                 self.attributes = issue.attributes.dup.except("id", "root_id", "parent_id", "lft", "rgt", "created_on", "updated_on")
                 self.custom_field_values = issue.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
                 self.status = issue.status
                 self.author = User.current
                 unless options[:attachments] == false
                   self.attachments = issue.attachments.map do |attachement|
                     attachement.copy(:container => self)
                   end
                 end
                 @copied_from = issue
                 @copy_options = options
                 self
               end
               # Returns an unsaved copy of the issue
               def copy(attributes=nil, copy_options={})
                 copy = self.class.new.copy_from(self, copy_options)
                 copy.attributes = attributes if attributes
                 copy
               end
               # Returns true if the issue is a copy
               def copy?
                 @copied_from.present?
               end
               # Moves/copies an issue to a new project and tracker
               # Returns the moved/copied issue on success, false on failure
               def move_to_project(new_project, new_tracker=nil, options={})
                 ActiveSupport::Deprecation.warn "Issue#move_to_project is deprecated, use #project= instead."
                 if options[:copy]
                   issue = self.copy
                 else
                   issue = self
                 end
                 issue.init_journal(User.current, options[:notes])
                 # Preserve previous behaviour
                 # #move_to_project doesn't change tracker automatically
                 issue.send :project=, new_project, true
                 if new_tracker
                   issue.tracker = new_tracker
                 end
                 # Allow bulk setting of attributes on the issue
                 if options[:attributes]
                   issue.attributes = options[:attributes]
                 end
                 issue.save ? issue : false
               end
               def status_id=(sid)
                 self.status = nil
                 result = write_attribute(:status_id, sid)
                 @workflow_rule_by_attribute = nil
                 result
               end
               def priority_id=(pid)
                 self.priority = nil
                 write_attribute(:priority_id, pid)
               end
               def category_id=(cid)
                 self.category = nil
                 write_attribute(:category_id, cid)
               end
               def fixed_version_id=(vid)
                 self.fixed_version = nil
                 write_attribute(:fixed_version_id, vid)
               end
               def tracker_id=(tid)
                 self.tracker = nil
                 result = write_attribute(:tracker_id, tid)
                 @custom_field_values = nil
                 @workflow_rule_by_attribute = nil
                 result
               end
               def project_id=(project_id)
                 if project_id.to_s != self.project_id.to_s
                   self.project = (project_id.present? ? Project.find_by_id(project_id) : nil)
                 end
               end
               def project=(project, keep_tracker=false)
                 project_was = self.project
                 write_attribute(:project_id, project ? project.id : nil)
                 association_instance_set('project', project)
                 if project_was && project && project_was != project
                   @assignable_versions = nil
                   unless keep_tracker || project.trackers.include?(tracker)
                     self.tracker = project.trackers.first
                   end
                   # Reassign to the category with same name if any
                   if category
                     self.category = project.issue_categories.find_by_name(category.name)
                   end
                   # Keep the fixed_version if it's still valid in the new_project
                   if fixed_version && fixed_version.project != project && !project.shared_versions.include?(fixed_version)
                     self.fixed_version = nil
                   end
                   # Clear the parent task if it's no longer valid
                   unless valid_parent_project?
                     self.parent_issue_id = nil
                   end
                   @custom_field_values = nil
                 end
               end
               def description=(arg)
                 if arg.is_a?(String)
                   arg = arg.gsub(/(\r\n|\n|\r)/, "\r\n")
                 end
                 write_attribute(:description, arg)
               end
               # Overrides assign_attributes so that project and tracker get assigned first
               def assign_attributes_with_project_and_tracker_first(new_attributes, *args)
                 return if new_attributes.nil?
                 attrs = new_attributes.dup
                 attrs.stringify_keys!
                 %w(project project_id tracker tracker_id).each do |attr|
                   if attrs.has_key?(attr)
                     send "#{attr}=", attrs.delete(attr)
                   end
                 end
                 send :assign_attributes_without_project_and_tracker_first, attrs, *args
               end
               # Do not redefine alias chain on reload (see #4838)
               alias_method_chain(:assign_attributes, :project_and_tracker_first) unless method_defined?(:assign_attributes_without_project_and_tracker_first)
               def attributes=(new_attributes)
                 assign_attributes new_attributes
               end
               def estimated_hours=(h)
                 write_attribute :estimated_hours, (h.is_a?(String) ? h.to_hours : h)
               end
               safe_attributes 'project_id',
                 :if => lambda {|issue, user|
                   if issue.new_record?
                     issue.copy?
                   elsif user.allowed_to?(:move_issues, issue.project)
                     Issue.allowed_target_projects_on_move.count > 1
                   end
                 }
               safe_attributes 'tracker_id',
                 'status_id',
                 'category_id',
                 'assigned_to_id',
                 'priority_id',
                 'fixed_version_id',
                 'subject',
                 'description',
                 'start_date',
                 'due_date',
                 'done_ratio',
                 'estimated_hours',
                 'custom_field_values',
                 'custom_fields',
                 'lock_version',
                 'notes',
                 :if => lambda {|issue, user| issue.new_record? || user.allowed_to?(:edit_issues, issue.project) }
               safe_attributes 'status_id',
                 'assigned_to_id',
                 'fixed_version_id',
                 'done_ratio',
                 'lock_version',
                 'notes',
                 :if => lambda {|issue, user| issue.new_statuses_allowed_to(user).any? }
               safe_attributes 'notes',
                 :if => lambda {|issue, user| user.allowed_to?(:add_issue_notes, issue.project)}
               safe_attributes 'private_notes',
                 :if => lambda {|issue, user| !issue.new_record? && user.allowed_to?(:set_notes_private, issue.project)}
               safe_attributes 'watcher_user_ids',
                 :if => lambda {|issue, user| issue.new_record? && user.allowed_to?(:add_issue_watchers, issue.project)}
               safe_attributes 'is_private',
                 :if => lambda {|issue, user|
                   user.allowed_to?(:set_issues_private, issue.project) ||
                     (issue.author == user && user.allowed_to?(:set_own_issues_private, issue.project))
                 }
               safe_attributes 'parent_issue_id',
                 :if => lambda {|issue, user| (issue.new_record? || user.allowed_to?(:edit_issues, issue.project)) &&
                   user.allowed_to?(:manage_subtasks, issue.project)}
               def safe_attribute_names(user=nil)
                 names = super
                 names -= disabled_core_fields
                 names -= read_only_attribute_names(user)
                 names
               end
               # Safely sets attributes
               # Should be called from controllers instead of #attributes=
               # attr_accessible is too rough because we still want things like
               # Issue.new(:project => foo) to work
               def safe_attributes=(attrs, user=User.current)
                 return unless attrs.is_a?(Hash)
                 attrs = attrs.deep_dup
                 # Project and Tracker must be set before since new_statuses_allowed_to depends on it.
                 if (p = attrs.delete('project_id')) && safe_attribute?('project_id')
                   if allowed_target_projects(user).where(:id => p.to_i).exists?
                     self.project_id = p
                   end
                 end
                 if (t = attrs.delete('tracker_id')) && safe_attribute?('tracker_id')
                   self.tracker_id = t
                 end
                 if (s = attrs.delete('status_id')) && safe_attribute?('status_id')
                   if new_statuses_allowed_to(user).collect(&:id).include?(s.to_i)
                     self.status_id = s
                   end
                 end
                 attrs = delete_unsafe_attributes(attrs, user)
                 return if attrs.empty?
                 unless leaf?
                   attrs.reject! {|k,v| %w(priority_id done_ratio start_date due_date estimated_hours).include?(k)}
                 end
                 if attrs['parent_issue_id'].present?
                   s = attrs['parent_issue_id'].to_s
                   unless (m = s.match(%r{\A#?(\d+)\z})) && (m[1] == parent_id.to_s || Issue.visible(user).exists?(m[1]))
                     @invalid_parent_issue_id = attrs.delete('parent_issue_id')
                   end
                 end
                 if attrs['custom_field_values'].present?
                   editable_custom_field_ids = editable_custom_field_values(user).map {|v| v.custom_field_id.to_s}
                   attrs['custom_field_values'].select! {|k, v| editable_custom_field_ids.include?(k.to_s)}
                 end
                 if attrs['custom_fields'].present?
                   editable_custom_field_ids = editable_custom_field_values(user).map {|v| v.custom_field_id.to_s}
                   attrs['custom_fields'].select! {|c| editable_custom_field_ids.include?(c['id'].to_s)}
                 end
                 # mass-assignment security bypass
                 assign_attributes attrs, :without_protection => true
               end
               def disabled_core_fields
                 tracker ? tracker.disabled_core_fields : []
               end
               # Returns the custom_field_values that can be edited by the given user
               def editable_custom_field_values(user=nil)
                 visible_custom_field_values(user).reject do |value|
                   read_only_attribute_names(user).include?(value.custom_field_id.to_s)
                 end
               end
               # Returns the custom fields that can be edited by the given user
               def editable_custom_fields(user=nil)
                 editable_custom_field_values(user).map(&:custom_field).uniq
               end
               # Returns the names of attributes that are read-only for user or the current user
               # For users with multiple roles, the read-only fields are the intersection of
               # read-only fields of each role
               # The result is an array of strings where sustom fields are represented with their ids
               #
               # Examples:
               #   issue.read_only_attribute_names # => ['due_date', '2']
               #   issue.read_only_attribute_names(user) # => []
               def read_only_attribute_names(user=nil)
                 workflow_rule_by_attribute(user).reject {|attr, rule| rule != 'readonly'}.keys
               end
               # Returns the names of required attributes for user or the current user
               # For users with multiple roles, the required fields are the intersection of
               # required fields of each role
               # The result is an array of strings where sustom fields are represented with their ids
               #
               # Examples:
               #   issue.required_attribute_names # => ['due_date', '2']
               #   issue.required_attribute_names(user) # => []
               def required_attribute_names(user=nil)
                 workflow_rule_by_attribute(user).reject {|attr, rule| rule != 'required'}.keys
               end
               # Returns true if the attribute is required for user
               def required_attribute?(name, user=nil)
                 required_attribute_names(user).include?(name.to_s)
               end
               # Returns a hash of the workflow rule by attribute for the given user
               #
               # Examples:
               #   issue.workflow_rule_by_attribute # => {'due_date' => 'required', 'start_date' => 'readonly'}
               def workflow_rule_by_attribute(user=nil)
                 return @workflow_rule_by_attribute if @workflow_rule_by_attribute && user.nil?
                 user_real = user || User.current
                 roles = user_real.admin ? Role.all : user_real.roles_for_project(project)
                 return {} if roles.empty?
                 result = {}
                 workflow_permissions = WorkflowPermission.where(:tracker_id => tracker_id, :old_status_id => status_id, :role_id => roles.map(&:id))
                 if workflow_permissions.any?
                   workflow_rules = workflow_permissions.inject({}) do |h, wp|
                     h[wp.field_name] ||= []
                     h[wp.field_name] << wp.rule
                     h
                   end
                   workflow_rules.each do |attr, rules|
                     next if rules.size < roles.size
                     uniq_rules = rules.uniq
                     if uniq_rules.size == 1
                       result[attr] = uniq_rules.first
                     else
                       result[attr] = 'required'
                     end
                   end
                 end
                 @workflow_rule_by_attribute = result if user.nil?
                 result
               end
               private :workflow_rule_by_attribute
               def done_ratio
                 if Issue.use_status_for_done_ratio? && status && status.default_done_ratio
                   status.default_done_ratio
                 else
                   read_attribute(:done_ratio)
                 end
               end
               def self.use_status_for_done_ratio?
                 Setting.issue_done_ratio == 'issue_status'
               end
               def self.use_field_for_done_ratio?
                 Setting.issue_done_ratio == 'issue_field'
               end
               def validate_issue
                 if due_date && start_date && (start_date_changed? || due_date_changed?) && due_date < start_date
                   errors.add :due_date, :greater_than_start_date
                 end
                 if start_date && start_date_changed? && soonest_start && start_date < soonest_start
                   errors.add :start_date, :earlier_than_minimum_start_date, :date => format_date(soonest_start)
                 end
                 if fixed_version
                   if !assignable_versions.include?(fixed_version)
                     errors.add :fixed_version_id, :inclusion
                   elsif reopening? && fixed_version.closed?
                     errors.add :base, I18n.t(:error_can_not_reopen_issue_on_closed_version)
                   end
                 end
                 # Checks that the issue can not be added/moved to a disabled tracker
                 if project && (tracker_id_changed? || project_id_changed?)
                   unless project.trackers.include?(tracker)
                     errors.add :tracker_id, :inclusion
                   end
                 end
                 # Checks parent issue assignment
                 if @invalid_parent_issue_id.present?
                   errors.add :parent_issue_id, :invalid
                 elsif @parent_issue
                   if !valid_parent_project?(@parent_issue)
                     errors.add :parent_issue_id, :invalid
                   elsif (@parent_issue != parent) && (all_dependent_issues.include?(@parent_issue) || @parent_issue.all_dependent_issues.include?(self))
                     errors.add :parent_issue_id, :invalid
                   elsif !new_record?
                     # moving an existing issue
                     if @parent_issue.root_id != root_id
                       # we can always move to another tree
                     elsif move_possible?(@parent_issue)
                       # move accepted inside tree
                     else
                       errors.add :parent_issue_id, :invalid
                     end
                   end
                 end
               end
               # Validates the issue against additional workflow requirements
               def validate_required_fields
                 user = new_record? ? author : current_journal.try(:user)
                 required_attribute_names(user).each do |attribute|
                   if attribute =~ /^\d+$/
                     attribute = attribute.to_i
                     v = custom_field_values.detect {|v| v.custom_field_id == attribute }
                     if v && v.value.blank?
                       errors.add :base, v.custom_field.name + ' ' + l('activerecord.errors.messages.blank')
                     end
                   else
                     if respond_to?(attribute) && send(attribute).blank?
                       errors.add attribute, :blank
                     end
                   end
                 end
               end
               # Set the done_ratio using the status if that setting is set.  This will keep the done_ratios
               # even if the user turns off the setting later
               def update_done_ratio_from_issue_status
                 if Issue.use_status_for_done_ratio? && status && status.default_done_ratio
                   self.done_ratio = status.default_done_ratio
                 end
               end
               def init_journal(user, notes = "")
                 @current_journal ||= Journal.new(:journalized => self, :user => user, :notes => notes)
                 if new_record?
                   @current_journal.notify = false
                 else
                   @attributes_before_change = attributes.dup
                   @custom_values_before_change = {}
                   self.custom_field_values.each {|c| @custom_values_before_change.store c.custom_field_id, c.value }
                 end
                 @current_journal
               end
               # Returns the id of the last journal or nil
               def last_journal_id
                 if new_record?
                   nil
                 else
                   journals.maximum(:id)
                 end
               end
               # Returns a scope for journals that have an id greater than journal_id
               def journals_after(journal_id)
                 scope = journals.reorder("#{Journal.table_name}.id ASC")
                 if journal_id.present?
                   scope = scope.where("#{Journal.table_name}.id > ?", journal_id.to_i)
                 end
                 scope
               end
               # Returns the initial status of the issue
               # Returns nil for a new issue
               def status_was
                 if status_id_was && status_id_was.to_i > 0
                   @status_was ||= IssueStatus.find_by_id(status_id_was)
                 end
               end
               # Return true if the issue is closed, otherwise false
               def closed?
                 status.present? && status.is_closed?
               end
               # Returns true if the issue was closed when loaded
               def was_closed?
                 status_was.present? && status_was.is_closed?
               end
               # Return true if the issue is being reopened
               def reopening?
                 if new_record?
                   false
                 else
                   status_id_changed? && !closed? && was_closed?
                 end
               end
               alias :reopened? :reopening?
               # Return true if the issue is being closed
               def closing?
                 if new_record?
                   closed?
                 else
                   status_id_changed? && closed? && !was_closed?
                 end
               end
               # Returns true if the issue is overdue
               def overdue?
                 due_date.present? && (due_date < Date.today) && !closed?
               end
               # Is the amount of work done less than it should for the due date
               def behind_schedule?
                 return false if start_date.nil? || due_date.nil?
                 done_date = start_date + ((due_date - start_date + 1) * done_ratio / 100).floor
                 return done_date <= Date.today
               end
               # Does this issue have children?
               def children?
                 !leaf?
               end
               # Users the issue can be assigned to
               def assignable_users
-                users = project.assignable_users
+                users = project.assignable_users.to_a
                 users << author if author
                 users << assigned_to if assigned_to
                 users.uniq.sort
               end
               # Versions that the issue can be assigned to
               def assignable_versions
                 return @assignable_versions if @assignable_versions
                 versions = project.shared_versions.open.to_a
                 if fixed_version
                   if fixed_version_id_changed?
                     # nothing to do
                   elsif project_id_changed?
                     if project.shared_versions.include?(fixed_version)
                       versions << fixed_version
                     end
                   else
                     versions << fixed_version
                   end
                 end
                 @assignable_versions = versions.uniq.sort
               end
               # Returns true if this issue is blocked by another issue that is still open
               def blocked?
                 !relations_to.detect {|ir| ir.relation_type == 'blocks' && !ir.issue_from.closed?}.nil?
               end
               # Returns an array of statuses that user is able to apply
               def new_statuses_allowed_to(user=User.current, include_default=false)
                 if new_record? && @copied_from
                   [IssueStatus.default, @copied_from.status].compact.uniq.sort
                 else
                   initial_status = nil
                   if new_record?
                     initial_status = IssueStatus.default
                   elsif status_id_was
                     initial_status = IssueStatus.find_by_id(status_id_was)
                   end
                   initial_status ||= status
                   initial_assigned_to_id = assigned_to_id_changed? ? assigned_to_id_was : assigned_to_id
                   assignee_transitions_allowed = initial_assigned_to_id.present? &&
                     (user.id == initial_assigned_to_id || user.group_ids.include?(initial_assigned_to_id))
                   statuses = initial_status.find_new_statuses_allowed_to(
                     user.admin ? Role.all : user.roles_for_project(project),
                     tracker,
                     author == user,
                     assignee_transitions_allowed
                     )
                   statuses << initial_status unless statuses.empty?
                   statuses << IssueStatus.default if include_default
                   statuses = statuses.compact.uniq.sort
                   blocked? ? statuses.reject {|s| s.is_closed?} : statuses
                 end
               end
               # Returns the previous assignee if changed
               def assigned_to_was
                 # assigned_to_id_was is reset before after_save callbacks
                 user_id = @previous_assigned_to_id || assigned_to_id_was
                 if user_id && user_id != assigned_to_id
                   @assigned_to_was ||= User.find_by_id(user_id)
                 end
               end
               # Returns the users that should be notified
               def notified_users
                 notified = []
                 # Author and assignee are always notified unless they have been
                 # locked or don't want to be notified
                 notified << author if author
                 if assigned_to
                   notified += (assigned_to.is_a?(Group) ? assigned_to.users : [assigned_to])
                 end
                 if assigned_to_was
                   notified += (assigned_to_was.is_a?(Group) ? assigned_to_was.users : [assigned_to_was])
                 end
                 notified = notified.select {|u| u.active? && u.notify_about?(self)}
                 notified += project.notified_users
                 notified.uniq!
                 # Remove users that can not view the issue
                 notified.reject! {|user| !visible?(user)}
                 notified
               end
               # Returns the email addresses that should be notified
               def recipients
                 notified_users.collect(&:mail)
               end
               def each_notification(users, &block)
                 if users.any?
                   if custom_field_values.detect {|value| !value.custom_field.visible?}
                     users_by_custom_field_visibility = users.group_by do |user|
                       visible_custom_field_values(user).map(&:custom_field_id).sort
                     end
                     users_by_custom_field_visibility.values.each do |users|
                       yield(users)
                     end
                   else
                     yield(users)
                   end
                 end
               end
               # Returns the number of hours spent on this issue
               def spent_hours
                 @spent_hours ||= time_entries.sum(:hours) || 0
               end
               # Returns the total number of hours spent on this issue and its descendants
               #
               # Example:
               #   spent_hours => 0.0
               #   spent_hours => 50.2
               def total_spent_hours
                 @total_spent_hours ||=
                   self_and_descendants.
                     joins("LEFT JOIN #{TimeEntry.table_name} ON #{TimeEntry.table_name}.issue_id = #{Issue.table_name}.id").
                     sum("#{TimeEntry.table_name}.hours").to_f || 0.0
               end
               def relations
                 @relations ||= IssueRelation::Relations.new(self, (relations_from + relations_to).sort)
               end
               # Preloads relations for a collection of issues
               def self.load_relations(issues)
                 if issues.any?
                   relations = IssueRelation.where("issue_from_id IN (:ids) OR issue_to_id IN (:ids)", :ids => issues.map(&:id)).all
                   issues.each do |issue|
                     issue.instance_variable_set "@relations", relations.select {|r| r.issue_from_id == issue.id || r.issue_to_id == issue.id}
                   end
                 end
               end
               # Preloads visible spent time for a collection of issues
               def self.load_visible_spent_hours(issues, user=User.current)
                 if issues.any?
                   hours_by_issue_id = TimeEntry.visible(user).group(:issue_id).sum(:hours)
                   issues.each do |issue|
                     issue.instance_variable_set "@spent_hours", (hours_by_issue_id[issue.id] || 0)
                   end
                 end
               end
               # Preloads visible relations for a collection of issues
               def self.load_visible_relations(issues, user=User.current)
                 if issues.any?
                   issue_ids = issues.map(&:id)
                   # Relations with issue_from in given issues and visible issue_to
                   relations_from = IssueRelation.joins(:issue_to => :project).
                                      where(visible_condition(user)).where(:issue_from_id => issue_ids).to_a
                   # Relations with issue_to in given issues and visible issue_from
                   relations_to = IssueRelation.joins(:issue_from => :project).
                                      where(visible_condition(user)).
                                      where(:issue_to_id => issue_ids).to_a
                   issues.each do |issue|
                     relations =
                       relations_from.select {|relation| relation.issue_from_id == issue.id} +
                       relations_to.select {|relation| relation.issue_to_id == issue.id}
                     issue.instance_variable_set "@relations", IssueRelation::Relations.new(issue, relations.sort)
                   end
                 end
               end
               # Finds an issue relation given its id.
               def find_relation(relation_id)
                 IssueRelation.where("issue_to_id = ? OR issue_from_id = ?", id, id).find(relation_id)
               end
               # Returns all the other issues that depend on the issue
               # The algorithm is a modified breadth first search (bfs)
               def all_dependent_issues(except=[])
                 # The found dependencies
                 dependencies = []
                 # The visited flag for every node (issue) used by the breadth first search
                 eNOT_DISCOVERED         = 0       # The issue is "new" to the algorithm, it has not seen it before.
                 ePROCESS_ALL            = 1       # The issue is added to the queue. Process both children and relations of
                                                   # the issue when it is processed.
                 ePROCESS_RELATIONS_ONLY = 2       # The issue was added to the queue and will be output as dependent issue,
                                                   # but its children will not be added to the queue when it is processed.
                 eRELATIONS_PROCESSED    = 3       # The related issues, the parent issue and the issue itself have been added to
                                                   # the queue, but its children have not been added.
                 ePROCESS_CHILDREN_ONLY  = 4       # The relations and the parent of the issue have been added to the queue, but
                                                   # the children still need to be processed.
                 eALL_PROCESSED          = 5       # The issue and all its children, its parent and its related issues have been
                                                   # added as dependent issues. It needs no further processing.
                 issue_status = Hash.new(eNOT_DISCOVERED)
                 # The queue
                 queue = []
                 # Initialize the bfs, add start node (self) to the queue
                 queue << self
                 issue_status[self] = ePROCESS_ALL
                 while (!queue.empty?) do
                   current_issue = queue.shift
                   current_issue_status = issue_status[current_issue]
                   dependencies << current_issue
                   # Add parent to queue, if not already in it.
                   parent = current_issue.parent
                   parent_status = issue_status[parent]
                   if parent && (parent_status == eNOT_DISCOVERED) && !except.include?(parent)
                     queue << parent
                     issue_status[parent] = ePROCESS_RELATIONS_ONLY
                   end
                   # Add children to queue, but only if they are not already in it and
                   # the children of the current node need to be processed.
                   if (current_issue_status == ePROCESS_CHILDREN_ONLY || current_issue_status == ePROCESS_ALL)
                     current_issue.children.each do |child|
                       next if except.include?(child)
                       if (issue_status[child] == eNOT_DISCOVERED)
                         queue << child
                         issue_status[child] = ePROCESS_ALL
                       elsif (issue_status[child] == eRELATIONS_PROCESSED)
                         queue << child
                         issue_status[child] = ePROCESS_CHILDREN_ONLY
                       elsif (issue_status[child] == ePROCESS_RELATIONS_ONLY)
                         queue << child
                         issue_status[child] = ePROCESS_ALL
                       end
                     end
                   end
                   # Add related issues to the queue, if they are not already in it.
                   current_issue.relations_from.map(&:issue_to).each do |related_issue|
                     next if except.include?(related_issue)
                     if (issue_status[related_issue] == eNOT_DISCOVERED)
                       queue << related_issue
                       issue_status[related_issue] = ePROCESS_ALL
                     elsif (issue_status[related_issue] == eRELATIONS_PROCESSED)
                       queue << related_issue
                       issue_status[related_issue] = ePROCESS_CHILDREN_ONLY
                     elsif (issue_status[related_issue] == ePROCESS_RELATIONS_ONLY)
                       queue << related_issue
                       issue_status[related_issue] = ePROCESS_ALL
                     end
                   end
                   # Set new status for current issue
                   if (current_issue_status == ePROCESS_ALL) || (current_issue_status == ePROCESS_CHILDREN_ONLY)
                     issue_status[current_issue] = eALL_PROCESSED
                   elsif (current_issue_status == ePROCESS_RELATIONS_ONLY)
                     issue_status[current_issue] = eRELATIONS_PROCESSED
                   end
                 end # while
                 # Remove the issues from the "except" parameter from the result array
                 dependencies -= except
                 dependencies.delete(self)
                 dependencies
               end
               # Returns an array of issues that duplicate this one
               def duplicates
                 relations_to.select {|r| r.relation_type == IssueRelation::TYPE_DUPLICATES}.collect {|r| r.issue_from}
               end
               # Returns the due date or the target due date if any
               # Used on gantt chart
               def due_before
                 due_date || (fixed_version ? fixed_version.effective_date : nil)
               end
               # Returns the time scheduled for this issue.
               #
               # Example:
               #   Start Date: 2/26/09, End Date: 3/04/09
               #   duration => 6
               def duration
                 (start_date && due_date) ? due_date - start_date : 0
               end
               # Returns the duration in working days
               def working_duration
                 (start_date && due_date) ? working_days(start_date, due_date) : 0
               end
               def soonest_start(reload=false)
                 @soonest_start = nil if reload
                 @soonest_start ||= (
                     relations_to(reload).collect{|relation| relation.successor_soonest_start} +
                     [(@parent_issue || parent).try(:soonest_start)]
                   ).compact.max
               end
               # Sets start_date on the given date or the next working day
               # and changes due_date to keep the same working duration.
               def reschedule_on(date)
                 wd = working_duration
                 date = next_working_date(date)
                 self.start_date = date
                 self.due_date = add_working_days(date, wd)
               end
               # Reschedules the issue on the given date or the next working day and saves the record.
               # If the issue is a parent task, this is done by rescheduling its subtasks.
               def reschedule_on!(date)
                 return if date.nil?
                 if leaf?
                   if start_date.nil? || start_date != date
                     if start_date && start_date > date
                       # Issue can not be moved earlier than its soonest start date
                       date = [soonest_start(true), date].compact.max
                     end
                     reschedule_on(date)
                     begin
                       save
                     rescue ActiveRecord::StaleObjectError
                       reload
                       reschedule_on(date)
                       save
                     end
                   end
                 else
                   leaves.each do |leaf|
                     if leaf.start_date
                       # Only move subtask if it starts at the same date as the parent
                       # or if it starts before the given date
                       if start_date == leaf.start_date || date > leaf.start_date
                         leaf.reschedule_on!(date)
                       end
                     else
                       leaf.reschedule_on!(date)
                     end
                   end
                 end
               end
               def <=>(issue)
                 if issue.nil?
                   -1
                 elsif root_id != issue.root_id
                   (root_id || 0) <=> (issue.root_id || 0)
                 else
                   (lft || 0) <=> (issue.lft || 0)
                 end
               end
               def to_s
                 "#{tracker} ##{id}: #{subject}"
               end
               # Returns a string of css classes that apply to the issue
               def css_classes(user=User.current)
                 s = "issue tracker-#{tracker_id} status-#{status_id} #{priority.try(:css_classes)}"
                 s << ' closed' if closed?
                 s << ' overdue' if overdue?
                 s << ' child' if child?
                 s << ' parent' unless leaf?
                 s << ' private' if is_private?
                 if user.logged?
                   s << ' created-by-me' if author_id == user.id
                   s << ' assigned-to-me' if assigned_to_id == user.id
                   s << ' assigned-to-my-group' if user.groups.any? {|g| g.id == assigned_to_id}
                 end
                 s
               end
               # Unassigns issues from +version+ if it's no longer shared with issue's project
               def self.update_versions_from_sharing_change(version)
                 # Update issues assigned to the version
                 update_versions(["#{Issue.table_name}.fixed_version_id = ?", version.id])
               end
               # Unassigns issues from versions that are no longer shared
               # after +project+ was moved
               def self.update_versions_from_hierarchy_change(project)
                 moved_project_ids = project.self_and_descendants.reload.collect(&:id)
                 # Update issues of the moved projects and issues assigned to a version of a moved project
                 Issue.update_versions(
                         ["#{Version.table_name}.project_id IN (?) OR #{Issue.table_name}.project_id IN (?)",
                          moved_project_ids, moved_project_ids]
                       )
               end
               def parent_issue_id=(arg)
                 s = arg.to_s.strip.presence
                 if s && (m = s.match(%r{\A#?(\d+)\z})) && (@parent_issue = Issue.find_by_id(m[1]))
                   @invalid_parent_issue_id = nil
                 elsif s.blank?
                   @parent_issue = nil
                   @invalid_parent_issue_id = nil
                 else
                   @parent_issue = nil
                   @invalid_parent_issue_id = arg
                 end
               end
               def parent_issue_id
                 if @invalid_parent_issue_id
                   @invalid_parent_issue_id
                 elsif instance_variable_defined? :@parent_issue
                   @parent_issue.nil? ? nil : @parent_issue.id
                 else
                   parent_id
                 end
               end
               # Returns true if issue's project is a valid
               # parent issue project
               def valid_parent_project?(issue=parent)
                 return true if issue.nil? || issue.project_id == project_id
                 case Setting.cross_project_subtasks
                 when 'system'
                   true
                 when 'tree'
                   issue.project.root == project.root
                 when 'hierarchy'
                   issue.project.is_or_is_ancestor_of?(project) || issue.project.is_descendant_of?(project)
                 when 'descendants'
                   issue.project.is_or_is_ancestor_of?(project)
                 else
                   false
                 end
               end
               # Returns an issue scope based on project and scope
               def self.cross_project_scope(project, scope=nil)
                 if project.nil?
                   return Issue
                 end
                 case scope
                 when 'all', 'system'
                   Issue
                 when 'tree'
                   Issue.joins(:project).where("(#{Project.table_name}.lft >= :lft AND #{Project.table_name}.rgt <= :rgt)",
                                               :lft => project.root.lft, :rgt => project.root.rgt)
                 when 'hierarchy'
                   Issue.joins(:project).where("(#{Project.table_name}.lft >= :lft AND #{Project.table_name}.rgt <= :rgt) OR (#{Project.table_name}.lft < :lft AND #{Project.table_name}.rgt > :rgt)",
                                               :lft => project.lft, :rgt => project.rgt)
                 when 'descendants'
                   Issue.joins(:project).where("(#{Project.table_name}.lft >= :lft AND #{Project.table_name}.rgt <= :rgt)",
                                               :lft => project.lft, :rgt => project.rgt)
                 else
                   Issue.where(:project_id => project.id)
                 end
               end
               def self.by_tracker(project)
                 count_and_group_by(:project => project, :association => :tracker)
               end
               def self.by_version(project)
                 count_and_group_by(:project => project, :association => :fixed_version)
               end
               def self.by_priority(project)
                 count_and_group_by(:project => project, :association => :priority)
               end
               def self.by_category(project)
                 count_and_group_by(:project => project, :association => :category)
               end
               def self.by_assigned_to(project)
                 count_and_group_by(:project => project, :association => :assigned_to)
               end
               def self.by_author(project)
                 count_and_group_by(:project => project, :association => :author)
               end
               def self.by_subproject(project)
                 r = count_and_group_by(:project => project, :with_subprojects => true, :association => :project)
                 r.reject {|r| r["project_id"] == project.id.to_s}
               end
               # Query generator for selecting groups of issue counts for a project
               # based on specific criteria
               #
               # Options
               # * project - Project to search in.
               # * with_subprojects - Includes subprojects issues if set to true.
               # * association - Symbol. Association for grouping.
               def self.count_and_group_by(options)
                 assoc = reflect_on_association(options[:association])
                 select_field = assoc.foreign_key
                 Issue.
                   visible(User.current, :project => options[:project], :with_subprojects => options[:with_subprojects]).
                   joins(:status, assoc.name).
                   group(:status_id, :is_closed, select_field).
                   count.
                   map do |columns, total|
                     status_id, is_closed, field_value = columns
                     is_closed = ['t', 'true', '1'].include?(is_closed.to_s)
                     {
                       "status_id" => status_id.to_s,
                       "closed" => is_closed,
                       select_field => field_value.to_s,
                       "total" => total.to_s
                     }
                   end
               end
               # Returns a scope of projects that user can assign the issue to
               def allowed_target_projects(user=User.current)
                 if new_record?
                   Project.where(Project.allowed_to_condition(user, :add_issues))
                 else
                   self.class.allowed_target_projects_on_move(user)
                 end
               end
               # Returns a scope of projects that user can move issues to
               def self.allowed_target_projects_on_move(user=User.current)
                 Project.where(Project.allowed_to_condition(user, :move_issues))
               end
               private
               def after_project_change
                 # Update project_id on related time entries
                 TimeEntry.where({:issue_id => id}).update_all(["project_id = ?", project_id])
                 # Delete issue relations
                 unless Setting.cross_project_issue_relations?
                   relations_from.clear
                   relations_to.clear
                 end
                 # Move subtasks that were in the same project
                 children.each do |child|
                   next unless child.project_id == project_id_was
                   # Change project and keep project
                   child.send :project=, project, true
                   unless child.save
                     raise ActiveRecord::Rollback
                   end
                 end
               end
               # Callback for after the creation of an issue by copy
               # * adds a "copied to" relation with the copied issue
               # * copies subtasks from the copied issue
               def after_create_from_copy
                 return unless copy? && !@after_create_from_copy_handled
                 if (@copied_from.project_id == project_id || Setting.cross_project_issue_relations?) && @copy_options[:link] != false
                   relation = IssueRelation.new(:issue_from => @copied_from, :issue_to => self, :relation_type => IssueRelation::TYPE_COPIED_TO)
                   unless relation.save
                     logger.error "Could not create relation while copying ##{@copied_from.id} to ##{id} due to validation errors: #{relation.errors.full_messages.join(', ')}" if logger
                   end
                 end
                 unless @copied_from.leaf? || @copy_options[:subtasks] == false
                   copy_options = (@copy_options || {}).merge(:subtasks => false)
                   copied_issue_ids = {@copied_from.id => self.id}
                   @copied_from.reload.descendants.reorder("#{Issue.table_name}.lft").each do |child|
                     # Do not copy self when copying an issue as a descendant of the copied issue
                     next if child == self
                     # Do not copy subtasks of issues that were not copied
                     next unless copied_issue_ids[child.parent_id]
                     # Do not copy subtasks that are not visible to avoid potential disclosure of private data
                     unless child.visible?
                       logger.error "Subtask ##{child.id} was not copied during ##{@copied_from.id} copy because it is not visible to the current user" if logger
                       next
                     end
                     copy = Issue.new.copy_from(child, copy_options)
                     copy.author = author
                     copy.project = project
                     copy.parent_issue_id = copied_issue_ids[child.parent_id]
                     unless copy.save
                       logger.error "Could not copy subtask ##{child.id} while copying ##{@copied_from.id} to ##{id} due to validation errors: #{copy.errors.full_messages.join(', ')}" if logger
                       next
                     end
                     copied_issue_ids[child.id] = copy.id
                   end
                 end
                 @after_create_from_copy_handled = true
               end
               def update_nested_set_attributes
                 if root_id.nil?
                   # issue was just created
                   self.root_id = (@parent_issue.nil? ? id : @parent_issue.root_id)
                   Issue.where(["id = ?", id]).update_all(["root_id = ?", root_id])
                   if @parent_issue
                     move_to_child_of(@parent_issue)
                   end
                 elsif parent_issue_id != parent_id
                   update_nested_set_attributes_on_parent_change
                 end
                 remove_instance_variable(:@parent_issue) if instance_variable_defined?(:@parent_issue)
               end
               # Updates the nested set for when an existing issue is moved
               def update_nested_set_attributes_on_parent_change
                 former_parent_id = parent_id
                 # moving an existing issue
                 if @parent_issue && @parent_issue.root_id == root_id
                   # inside the same tree
                   move_to_child_of(@parent_issue)
                 else
                   # to another tree
                   unless root?
                     move_to_right_of(root)
                   end
                   old_root_id = root_id
                   in_tenacious_transaction do
                     @parent_issue.reload_nested_set if @parent_issue
                     self.reload_nested_set
                     self.root_id = (@parent_issue.nil? ? id : @parent_issue.root_id)
                     cond = ["root_id = ? AND lft >= ? AND rgt <= ? ", old_root_id, lft, rgt]
                     self.class.base_class.select('id').lock(true).where(cond)
                     offset = rdm_right_most_bound + 1 - lft
                     Issue.where(cond).
                       update_all(["root_id = ?, lft = lft + ?, rgt = rgt + ?", root_id, offset, offset])
                   end
                   if @parent_issue
                     move_to_child_of(@parent_issue)
                   end
                 end
                 # delete invalid relations of all descendants
                 self_and_descendants.each do |issue|
                   issue.relations.each do |relation|
                     relation.destroy unless relation.valid?
                   end
                 end
                 # update former parent
                 recalculate_attributes_for(former_parent_id) if former_parent_id
               end
               def rdm_right_most_bound
                 right_most_node =
                   self.class.base_class.unscoped.
                     order("#{quoted_right_column_full_name} desc").limit(1).lock(true).first
                   right_most_node ? (right_most_node[right_column_name] || 0 ) : 0
               end
               private :rdm_right_most_bound
               def update_parent_attributes
                 recalculate_attributes_for(parent_id) if parent_id
               end
               def recalculate_attributes_for(issue_id)
                 if issue_id && p = Issue.find_by_id(issue_id)
                   # priority = highest priority of children
                   if priority_position = p.children.joins(:priority).maximum("#{IssuePriority.table_name}.position")
                     p.priority = IssuePriority.find_by_position(priority_position)
                   end
                   # start/due dates = lowest/highest dates of children
                   p.start_date = p.children.minimum(:start_date)
                   p.due_date = p.children.maximum(:due_date)
                   if p.start_date && p.due_date && p.due_date < p.start_date
                     p.start_date, p.due_date = p.due_date, p.start_date
                   end
                   # done ratio = weighted average ratio of leaves
                   unless Issue.use_status_for_done_ratio? && p.status && p.status.default_done_ratio
                     leaves_count = p.leaves.count
                     if leaves_count > 0
                       average = p.leaves.where("estimated_hours > 0").average(:estimated_hours).to_f
                       if average == 0
                         average = 1
                       end
                       done = p.leaves.joins(:status).
                         sum("COALESCE(CASE WHEN estimated_hours > 0 THEN estimated_hours ELSE NULL END, #{average}) " +
                             "* (CASE WHEN is_closed = #{self.class.connection.quoted_true} THEN 100 ELSE COALESCE(done_ratio, 0) END)").to_f
                       progress = done / (average * leaves_count)
                       p.done_ratio = progress.round
                     end
                   end
                   # estimate = sum of leaves estimates
                   p.estimated_hours = p.leaves.sum(:estimated_hours).to_f
                   p.estimated_hours = nil if p.estimated_hours == 0.0
                   # ancestors will be recursively updated
                   p.save(:validate => false)
                 end
               end
               # Update issues so their versions are not pointing to a
               # fixed_version that is not shared with the issue's project
               def self.update_versions(conditions=nil)
                 # Only need to update issues with a fixed_version from
                 # a different project and that is not systemwide shared
                 Issue.joins(:project, :fixed_version).
                   where("#{Issue.table_name}.fixed_version_id IS NOT NULL" +
                     " AND #{Issue.table_name}.project_id <> #{Version.table_name}.project_id" +
                     " AND #{Version.table_name}.sharing <> 'system'").
                   where(conditions).each do |issue|
                   next if issue.project.nil? || issue.fixed_version.nil?
                   unless issue.project.shared_versions.include?(issue.fixed_version)
                     issue.init_journal(User.current)
                     issue.fixed_version = nil
                     issue.save
                   end
                 end
               end
               # Callback on file attachment
               def attachment_added(obj)
                 if @current_journal && !obj.new_record?
                   @current_journal.details << JournalDetail.new(:property => 'attachment', :prop_key => obj.id, :value => obj.filename)
                 end
               end
               # Callback on attachment deletion
               def attachment_removed(obj)
                 if @current_journal && !obj.new_record?
                   @current_journal.details << JournalDetail.new(:property => 'attachment', :prop_key => obj.id, :old_value => obj.filename)
                   @current_journal.save
                 end
               end
               # Default assignment based on category
               def default_assign
                 if assigned_to.nil? && category && category.assigned_to
                   self.assigned_to = category.assigned_to
                 end
               end
               # Updates start/due dates of following issues
               def reschedule_following_issues
                 if start_date_changed? || due_date_changed?
                   relations_from.each do |relation|
                     relation.set_issue_to_dates
                   end
                 end
               end
               # Closes duplicates if the issue is being closed
               def close_duplicates
                 if closing?
                   duplicates.each do |duplicate|
                     # Reload is needed in case the duplicate was updated by a previous duplicate
                     duplicate.reload
                     # Don't re-close it if it's already closed
                     next if duplicate.closed?
                     # Same user and notes
                     if @current_journal
                       duplicate.init_journal(@current_journal.user, @current_journal.notes)
                     end
                     duplicate.update_attribute :status, self.status
                   end
                 end
               end
               # Make sure updated_on is updated when adding a note and set updated_on now
               # so we can set closed_on with the same value on closing
               def force_updated_on_change
                 if @current_journal || changed?
                   self.updated_on = current_time_from_proper_timezone
                   if new_record?
                     self.created_on = updated_on
                   end
                 end
               end
               # Callback for setting closed_on when the issue is closed.
               # The closed_on attribute stores the time of the last closing
               # and is preserved when the issue is reopened.
               def update_closed_on
                 if closing?
                   self.closed_on = updated_on
                 end
               end
               # Saves the changes in a Journal
               # Called after_save
               def create_journal
                 if @current_journal
                   # attributes changes
                   if @attributes_before_change
                     (Issue.column_names - %w(id root_id lft rgt lock_version created_on updated_on closed_on)).each {|c|
                       before = @attributes_before_change[c]
                       after = send(c)
                       next if before == after || (before.blank? && after.blank?)
                       @current_journal.details << JournalDetail.new(:property => 'attr',
                                                                     :prop_key => c,
                                                                     :old_value => before,
                                                                     :value => after)
                     }
                   end
                   if @custom_values_before_change
                     # custom fields changes
                     custom_field_values.each {|c|
                       before = @custom_values_before_change[c.custom_field_id]
                       after = c.value
                       next if before == after || (before.blank? && after.blank?)
                       if before.is_a?(Array) || after.is_a?(Array)
                         before = [before] unless before.is_a?(Array)
                         after = [after] unless after.is_a?(Array)
                         # values removed
                         (before - after).reject(&:blank?).each do |value|
                           @current_journal.details << JournalDetail.new(:property => 'cf',
                                                                         :prop_key => c.custom_field_id,
                                                                         :old_value => value,
                                                                         :value => nil)
                         end
                         # values added
                         (after - before).reject(&:blank?).each do |value|
                           @current_journal.details << JournalDetail.new(:property => 'cf',
                                                                         :prop_key => c.custom_field_id,
                                                                         :old_value => nil,
                                                                         :value => value)
                         end
                       else
                         @current_journal.details << JournalDetail.new(:property => 'cf',
                                                                       :prop_key => c.custom_field_id,
                                                                       :old_value => before,
                                                                       :value => after)
                       end
                     }
                   end
                   @current_journal.save
                   # reset current journal
                   init_journal @current_journal.user, @current_journal.notes
                 end
               end
               def send_notification
                 if Setting.notified_events.include?('issue_added')
                   Mailer.deliver_issue_add(self)
                 end
               end
               # Stores the previous assignee so we can still have access
               # to it during after_save callbacks (assigned_to_id_was is reset)
               def set_assigned_to_was
                 @previous_assigned_to_id = assigned_to_id_was
               end
               # Clears the previous assignee at the end of after_save callbacks
               def clear_assigned_to_was
                 @assigned_to_was = nil
                 @previous_assigned_to_id = nil
               end
             end

app/models/project.rb +7 -5

             # Redmine - project management software
             # Copyright (C) 2006-2014  Jean-Philippe Lang
             #
             # This program is free software; you can redistribute it and/or
             # modify it under the terms of the GNU General Public License
             # as published by the Free Software Foundation; either version 2
             # of the License, or (at your option) any later version.
             #
             # This program is distributed in the hope that it will be useful,
             # but WITHOUT ANY WARRANTY; without even the implied warranty of
             # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
             # GNU General Public License for more details.
             #
             # You should have received a copy of the GNU General Public License
             # along with this program; if not, write to the Free Software
             # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
             class Project < ActiveRecord::Base
               include Redmine::SafeAttributes
               # Project statuses
               STATUS_ACTIVE     = 1
               STATUS_CLOSED     = 5
               STATUS_ARCHIVED   = 9
               # Maximum length for project identifiers
               IDENTIFIER_MAX_LENGTH = 100
               # Specific overridden Activities
               has_many :time_entry_activities
               has_many :members,
                        lambda { joins(:principal, :roles).
                                 where("#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE}") }
               has_many :memberships, :class_name => 'Member'
               has_many :member_principals,
                        lambda { joins(:principal).
                                 where("#{Principal.table_name}.status=#{Principal::STATUS_ACTIVE}")},
                 :class_name => 'Member'
               has_many :enabled_modules, :dependent => :delete_all
               has_and_belongs_to_many :trackers, lambda {order("#{Tracker.table_name}.position")}
               has_many :issues, :dependent => :destroy
               has_many :issue_changes, :through => :issues, :source => :journals
               has_many :versions, lambda {order("#{Version.table_name}.effective_date DESC, #{Version.table_name}.name DESC")}, :dependent => :destroy
               has_many :time_entries, :dependent => :destroy
               has_many :queries, :class_name => 'IssueQuery', :dependent => :delete_all
               has_many :documents, :dependent => :destroy
               has_many :news, lambda {includes(:author)}, :dependent => :destroy
               has_many :issue_categories, lambda {order("#{IssueCategory.table_name}.name")}, :dependent => :delete_all
               has_many :boards, lambda {order("position ASC")}, :dependent => :destroy
               has_one :repository, lambda {where(["is_default = ?", true])}
               has_many :repositories, :dependent => :destroy
               has_many :changesets, :through => :repository
               has_one :wiki, :dependent => :destroy
               # Custom field for the project issues
               has_and_belongs_to_many :issue_custom_fields,
                                       lambda {order("#{CustomField.table_name}.position")},
                                       :class_name => 'IssueCustomField',
                                       :join_table => "#{table_name_prefix}custom_fields_projects#{table_name_suffix}",
                                       :association_foreign_key => 'custom_field_id'
               acts_as_nested_set :dependent => :destroy
               acts_as_attachable :view_permission => :view_files,
                                  :delete_permission => :manage_files
               acts_as_customizable
               acts_as_searchable :columns => ['name', 'identifier', 'description'], :project_key => 'id', :permission => nil
               acts_as_event :title => Proc.new {|o| "#{l(:label_project)}: #{o.name}"},
                             :url => Proc.new {|o| {:controller => 'projects', :action => 'show', :id => o}},
                             :author => nil
               attr_protected :status
               validates_presence_of :name, :identifier
               validates_uniqueness_of :identifier
               validates_associated :repository, :wiki
               validates_length_of :name, :maximum => 255
               validates_length_of :homepage, :maximum => 255
               validates_length_of :identifier, :in => 1..IDENTIFIER_MAX_LENGTH
               # downcase letters, digits, dashes but not digits only
               validates_format_of :identifier, :with => /\A(?!\d+$)[a-z0-9\-_]*\z/, :if => Proc.new { |p| p.identifier_changed? }
               # reserved words
               validates_exclusion_of :identifier, :in => %w( new )
               after_save :update_position_under_parent, :if => Proc.new {|project| project.name_changed?}
               after_save :update_inherited_members, :if => Proc.new {|project| project.inherit_members_changed?}
               before_destroy :delete_all_members
               scope :has_module, lambda {|mod|
                 where("#{Project.table_name}.id IN (SELECT em.project_id FROM #{EnabledModule.table_name} em WHERE em.name=?)", mod.to_s)
               }
               scope :active, lambda { where(:status => STATUS_ACTIVE) }
               scope :status, lambda {|arg| where(arg.blank? ? nil : {:status => arg.to_i}) }
               scope :all_public, lambda { where(:is_public => true) }
               scope :visible, lambda {|*args| where(Project.visible_condition(args.shift || User.current, *args)) }
               scope :allowed_to, lambda {|*args|
                 user = User.current
                 permission = nil
                 if args.first.is_a?(Symbol)
                   permission = args.shift
                 else
                   user = args.shift
                   permission = args.shift
                 end
                 where(Project.allowed_to_condition(user, permission, *args))
               }
               scope :like, lambda {|arg|
                 if arg.blank?
                   where(nil)
                 else
                   pattern = "%#{arg.to_s.strip.downcase}%"
                   where("LOWER(identifier) LIKE :p OR LOWER(name) LIKE :p", :p => pattern)
                 end
               }
               def initialize(attributes=nil, *args)
                 super
                 initialized = (attributes || {}).stringify_keys
                 if !initialized.key?('identifier') && Setting.sequential_project_identifiers?
                   self.identifier = Project.next_identifier
                 end
                 if !initialized.key?('is_public')
                   self.is_public = Setting.default_projects_public?
                 end
                 if !initialized.key?('enabled_module_names')
                   self.enabled_module_names = Setting.default_projects_modules
                 end
                 if !initialized.key?('trackers') && !initialized.key?('tracker_ids')
                   default = Setting.default_projects_tracker_ids
                   if default.is_a?(Array)
                     self.trackers = Tracker.where(:id => default.map(&:to_i)).sorted.to_a
                   else
                     self.trackers = Tracker.sorted.to_a
                   end
                 end
               end
               def identifier=(identifier)
                 super unless identifier_frozen?
               end
               def identifier_frozen?
                 errors[:identifier].blank? && !(new_record? || identifier.blank?)
               end
               # returns latest created projects
               # non public projects will be returned only if user is a member of those
               def self.latest(user=nil, count=5)
                 visible(user).limit(count).order("created_on DESC").to_a
               end
               # Returns true if the project is visible to +user+ or to the current user.
               def visible?(user=User.current)
                 user.allowed_to?(:view_project, self)
               end
               # Returns a SQL conditions string used to find all projects visible by the specified user.
               #
               # Examples:
               #   Project.visible_condition(admin)        => "projects.status = 1"
               #   Project.visible_condition(normal_user)  => "((projects.status = 1) AND (projects.is_public = 1 OR projects.id IN (1,3,4)))"
               #   Project.visible_condition(anonymous)    => "((projects.status = 1) AND (projects.is_public = 1))"
               def self.visible_condition(user, options={})
                 allowed_to_condition(user, :view_project, options)
               end
               # Returns a SQL conditions string used to find all projects for which +user+ has the given +permission+
               #
               # Valid options:
               # * :project => limit the condition to project
               # * :with_subprojects => limit the condition to project and its subprojects
               # * :member => limit the condition to the user projects
               def self.allowed_to_condition(user, permission, options={})
                 perm = Redmine::AccessControl.permission(permission)
                 base_statement = (perm && perm.read? ? "#{Project.table_name}.status <> #{Project::STATUS_ARCHIVED}" : "#{Project.table_name}.status = #{Project::STATUS_ACTIVE}")
                 if perm && perm.project_module
                   # If the permission belongs to a project module, make sure the module is enabled
                   base_statement << " AND #{Project.table_name}.id IN (SELECT em.project_id FROM #{EnabledModule.table_name} em WHERE em.name='#{perm.project_module}')"
                 end
                 if project = options[:project]
                   project_statement = project.project_condition(options[:with_subprojects])
                   base_statement = "(#{project_statement}) AND (#{base_statement})"
                 end
                 if user.admin?
                   base_statement
                 else
                   statement_by_role = {}
                   unless options[:member]
                     role = user.builtin_role
                     if role.allowed_to?(permission)
                       statement_by_role[role] = "#{Project.table_name}.is_public = #{connection.quoted_true}"
                     end
                   end
                   user.projects_by_role.each do |role, projects|
                     if role.allowed_to?(permission) && projects.any?
                       statement_by_role[role] = "#{Project.table_name}.id IN (#{projects.collect(&:id).join(',')})"
                     end
                   end
                   if statement_by_role.empty?
                     "1=0"
                   else
                     if block_given?
                       statement_by_role.each do |role, statement|
                         if s = yield(role, user)
                           statement_by_role[role] = "(#{statement} AND (#{s}))"
                         end
                       end
                     end
                     "((#{base_statement}) AND (#{statement_by_role.values.join(' OR ')}))"
                   end
                 end
               end
               def override_roles(role)
                 group_class = role.anonymous? ? GroupAnonymous : GroupNonMember
                 member = member_principals.where("#{Principal.table_name}.type = ?", group_class.name).first
                 member ? member.roles.to_a : [role]
               end
               def principals
                 @principals ||= Principal.active.joins(:members).where("#{Member.table_name}.project_id = ?", id).uniq
               end
               def users
                 @users ||= User.active.joins(:members).where("#{Member.table_name}.project_id = ?", id).uniq
               end
               # Returns the Systemwide and project specific activities
               def activities(include_inactive=false)
                 if include_inactive
                   return all_activities
                 else
                   return active_activities
                 end
               end
               # Will create a new Project specific Activity or update an existing one
               #
               # This will raise a ActiveRecord::Rollback if the TimeEntryActivity
               # does not successfully save.
               def update_or_create_time_entry_activity(id, activity_hash)
                 if activity_hash.respond_to?(:has_key?) && activity_hash.has_key?('parent_id')
                   self.create_time_entry_activity_if_needed(activity_hash)
                 else
                   activity = project.time_entry_activities.find_by_id(id.to_i)
                   activity.update_attributes(activity_hash) if activity
                 end
               end
               # Create a new TimeEntryActivity if it overrides a system TimeEntryActivity
               #
               # This will raise a ActiveRecord::Rollback if the TimeEntryActivity
               # does not successfully save.
               def create_time_entry_activity_if_needed(activity)
                 if activity['parent_id']
                   parent_activity = TimeEntryActivity.find(activity['parent_id'])
                   activity['name'] = parent_activity.name
                   activity['position'] = parent_activity.position
                   if Enumeration.overriding_change?(activity, parent_activity)
                     project_activity = self.time_entry_activities.create(activity)
                     if project_activity.new_record?
                       raise ActiveRecord::Rollback, "Overriding TimeEntryActivity was not successfully saved"
                     else
                       self.time_entries.
                         where(["activity_id = ?", parent_activity.id]).
                         update_all("activity_id = #{project_activity.id}")
                     end
                   end
                 end
               end
               # Returns a :conditions SQL string that can be used to find the issues associated with this project.
               #
               # Examples:
               #   project.project_condition(true)  => "(projects.id = 1 OR (projects.lft > 1 AND projects.rgt < 10))"
               #   project.project_condition(false) => "projects.id = 1"
               def project_condition(with_subprojects)
                 cond = "#{Project.table_name}.id = #{id}"
                 cond = "(#{cond} OR (#{Project.table_name}.lft > #{lft} AND #{Project.table_name}.rgt < #{rgt}))" if with_subprojects
                 cond
               end
               def self.find(*args)
                 if args.first && args.first.is_a?(String) && !args.first.match(/^\d*$/)
                   project = find_by_identifier(*args)
                   raise ActiveRecord::RecordNotFound, "Couldn't find Project with identifier=#{args.first}" if project.nil?
                   project
                 else
                   super
                 end
               end
               def self.find_by_param(*args)
                 self.find(*args)
               end
               alias :base_reload :reload
               def reload(*args)
                 @principals = nil
                 @users = nil
                 @shared_versions = nil
                 @rolled_up_versions = nil
                 @rolled_up_trackers = nil
                 @all_issue_custom_fields = nil
                 @all_time_entry_custom_fields = nil
                 @to_param = nil
                 @allowed_parents = nil
                 @allowed_permissions = nil
                 @actions_allowed = nil
                 @start_date = nil
                 @due_date = nil
                 @override_members = nil
                 base_reload(*args)
               end
               def to_param
                 # id is used for projects with a numeric identifier (compatibility)
                 @to_param ||= (identifier.to_s =~ %r{^\d*$} ? id.to_s : identifier)
               end
               def active?
                 self.status == STATUS_ACTIVE
               end
               def archived?
                 self.status == STATUS_ARCHIVED
               end
               # Archives the project and its descendants
               def archive
                 # Check that there is no issue of a non descendant project that is assigned
                 # to one of the project or descendant versions
                 v_ids = self_and_descendants.collect {|p| p.version_ids}.flatten
                 if v_ids.any? &&
                   Issue.
                     includes(:project).
                     where("#{Project.table_name}.lft < ? OR #{Project.table_name}.rgt > ?", lft, rgt).
                     where("#{Issue.table_name}.fixed_version_id IN (?)", v_ids).
                     exists?
                   return false
                 end
                 Project.transaction do
                   archive!
                 end
                 true
               end
               # Unarchives the project
               # All its ancestors must be active
               def unarchive
                 return false if ancestors.detect {|a| !a.active?}
                 update_attribute :status, STATUS_ACTIVE
               end
               def close
                 self_and_descendants.status(STATUS_ACTIVE).update_all :status => STATUS_CLOSED
               end
               def reopen
                 self_and_descendants.status(STATUS_CLOSED).update_all :status => STATUS_ACTIVE
               end
               # Returns an array of projects the project can be moved to
               # by the current user
               def allowed_parents
                 return @allowed_parents if @allowed_parents
                 @allowed_parents = Project.where(Project.allowed_to_condition(User.current, :add_subprojects)).to_a
                 @allowed_parents = @allowed_parents - self_and_descendants
                 if User.current.allowed_to?(:add_project, nil, :global => true) || (!new_record? && parent.nil?)
                   @allowed_parents << nil
                 end
                 unless parent.nil? || @allowed_parents.empty? || @allowed_parents.include?(parent)
                   @allowed_parents << parent
                 end
                 @allowed_parents
               end
               # Sets the parent of the project with authorization check
               def set_allowed_parent!(p)
                 unless p.nil? || p.is_a?(Project)
                   if p.to_s.blank?
                     p = nil
                   else
                     p = Project.find_by_id(p)
                     return false unless p
                   end
                 end
                 if p.nil?
                   if !new_record? && allowed_parents.empty?
                     return false
                   end
                 elsif !allowed_parents.include?(p)
                   return false
                 end
                 set_parent!(p)
               end
               # Sets the parent of the project
               # Argument can be either a Project, a String, a Fixnum or nil
               def set_parent!(p)
                 unless p.nil? || p.is_a?(Project)
                   if p.to_s.blank?
                     p = nil
                   else
                     p = Project.find_by_id(p)
                     return false unless p
                   end
                 end
                 if p == parent && !p.nil?
                   # Nothing to do
                   true
                 elsif p.nil? || (p.active? && move_possible?(p))
                   set_or_update_position_under(p)
                   Issue.update_versions_from_hierarchy_change(self)
                   true
                 else
                   # Can not move to the given target
                   false
                 end
               end
               # Recalculates all lft and rgt values based on project names
               # Unlike Project.rebuild!, these values are recalculated even if the tree "looks" valid
               # Used in BuildProjectsTree migration
               def self.rebuild_tree!
                 transaction do
                   update_all "lft = NULL, rgt = NULL"
                   rebuild!(false)
                   all.each { |p| p.set_or_update_position_under(p.parent) }
                 end
               end
               # Returns an array of the trackers used by the project and its active sub projects
               def rolled_up_trackers
                 @rolled_up_trackers ||=
                   Tracker.
                     joins(:projects).
                     joins("JOIN #{EnabledModule.table_name} ON #{EnabledModule.table_name}.project_id = #{Project.table_name}.id AND #{EnabledModule.table_name}.name = 'issue_tracking'").
                     select("DISTINCT #{Tracker.table_name}.*").
                     where("#{Project.table_name}.lft >= ? AND #{Project.table_name}.rgt <= ? AND #{Project.table_name}.status <> #{STATUS_ARCHIVED}", lft, rgt).
                     sorted.
                     to_a
               end
               # Closes open and locked project versions that are completed
               def close_completed_versions
                 Version.transaction do
                   versions.where(:status => %w(open locked)).each do |version|
                     if version.completed?
                       version.update_attribute(:status, 'closed')
                     end
                   end
                 end
               end
               # Returns a scope of the Versions on subprojects
               def rolled_up_versions
                 @rolled_up_versions ||=
                   Version.
                     joins(:project).
                     where("#{Project.table_name}.lft >= ? AND #{Project.table_name}.rgt <= ? AND #{Project.table_name}.status <> ?", lft, rgt, STATUS_ARCHIVED)
               end
               # Returns a scope of the Versions used by the project
               def shared_versions
                 if new_record?
                   Version.
                     joins(:project).
                     preload(:project).
                     where("#{Project.table_name}.status <> ? AND #{Version.table_name}.sharing = 'system'", STATUS_ARCHIVED)
                 else
                   @shared_versions ||= begin
                     r = root? ? self : root
                     Version.
                       joins(:project).
                       preload(:project).
                       where("#{Project.table_name}.id = #{id}" +
                               " OR (#{Project.table_name}.status <> #{Project::STATUS_ARCHIVED} AND (" +
                                 " #{Version.table_name}.sharing = 'system'" +
                                 " OR (#{Project.table_name}.lft >= #{r.lft} AND #{Project.table_name}.rgt <= #{r.rgt} AND #{Version.table_name}.sharing = 'tree')" +
                                 " OR (#{Project.table_name}.lft < #{lft} AND #{Project.table_name}.rgt > #{rgt} AND #{Version.table_name}.sharing IN ('hierarchy', 'descendants'))" +
                                 " OR (#{Project.table_name}.lft > #{lft} AND #{Project.table_name}.rgt < #{rgt} AND #{Version.table_name}.sharing = 'hierarchy')" +
                               "))")
                   end
                 end
               end
               # Returns a hash of project users grouped by role
               def users_by_role
                 members.includes(:user, :roles).inject({}) do |h, m|
                   m.roles.each do |r|
                     h[r] ||= []
                     h[r] << m.user
                   end
                   h
                 end
               end
               # Deletes all project's members
               def delete_all_members
                 me, mr = Member.table_name, MemberRole.table_name
                 self.class.connection.delete("DELETE FROM #{mr} WHERE #{mr}.member_id IN (SELECT #{me}.id FROM #{me} WHERE #{me}.project_id = #{id})")
                 Member.delete_all(['project_id = ?', id])
               end
-              # Users/groups issues can be assigned to
+              # Return a Principal scope of users/groups issues can be assigned to
               def assignable_users
                 types = ['User']
                 types << 'Group' if Setting.issue_group_assignment?
-                member_principals.
+                @assignable_users ||= Principal.
-                  select {|m| types.include?(m.principal.type) && m.roles.detect(&:assignable?)}.
+                  active.
-                  map(&:principal).
+                  joins(:members => :roles).
-                  sort
+                  where(:type => types, :members => {:project_id => id}, :roles => {:assignable => true}).
+                  uniq.
+                  sorted
               end
               # Returns the mail addresses of users that should be always notified on project events
               def recipients
                 notified_users.collect {|user| user.mail}
               end
               # Returns the users that should be notified on project events
               def notified_users
                 # TODO: User part should be extracted to User#notify_about?
                 members.select {|m| m.principal.present? && (m.mail_notification? || m.principal.mail_notification == 'all')}.collect {|m| m.principal}
               end
               # Returns a scope of all custom fields enabled for project issues
               # (explicitly associated custom fields and custom fields enabled for all projects)
               def all_issue_custom_fields
                 @all_issue_custom_fields ||= IssueCustomField.
                   sorted.
                   where("is_for_all = ? OR id IN (SELECT DISTINCT cfp.custom_field_id" +
                     " FROM #{table_name_prefix}custom_fields_projects#{table_name_suffix} cfp" +
                     " WHERE cfp.project_id = ?)", true, id)
               end
               # Returns an array of all custom fields enabled for project time entries
               # (explictly associated custom fields and custom fields enabled for all projects)
               def all_time_entry_custom_fields
                 @all_time_entry_custom_fields ||= (TimeEntryCustomField.for_all + time_entry_custom_fields).uniq.sort
               end
               def project
                 self
               end
               def <=>(project)
                 name.downcase <=> project.name.downcase
               end
               def to_s
                 name
               end
               # Returns a short description of the projects (first lines)
               def short_description(length = 255)
                 description.gsub(/^(.{#{length}}[^\n\r]*).*$/m, '\1...').strip if description
               end
               def css_classes
                 s = 'project'
                 s << ' root' if root?
                 s << ' child' if child?
                 s << (leaf? ? ' leaf' : ' parent')
                 unless active?
                   if archived?
                     s << ' archived'
                   else
                     s << ' closed'
                   end
                 end
                 s
               end
               # The earliest start date of a project, based on it's issues and versions
               def start_date
                 @start_date ||= [
                  issues.minimum('start_date'),
                  shared_versions.minimum('effective_date'),
                  Issue.fixed_version(shared_versions).minimum('start_date')
                 ].compact.min
               end
               # The latest due date of an issue or version
               def due_date
                 @due_date ||= [
                  issues.maximum('due_date'),
                  shared_versions.maximum('effective_date'),
                  Issue.fixed_version(shared_versions).maximum('due_date')
                 ].compact.max
               end
               def overdue?
                 active? && !due_date.nil? && (due_date < Date.today)
               end
               # Returns the percent completed for this project, based on the
               # progress on it's versions.
               def completed_percent(options={:include_subprojects => false})
                 if options.delete(:include_subprojects)
                   total = self_and_descendants.collect(&:completed_percent).sum
                   total / self_and_descendants.count
                 else
                   if versions.count > 0
                     total = versions.collect(&:completed_percent).sum
                     total / versions.count
                   else
                   end
                 end
               end
               # Return true if this project allows to do the specified action.
               # action can be:
               # * a parameter-like Hash (eg. :controller => 'projects', :action => 'edit')
               # * a permission Symbol (eg. :edit_project)
               def allows_to?(action)
                 if archived?
                   # No action allowed on archived projects
                   return false
                 end
                 unless active? || Redmine::AccessControl.read_action?(action)
                   # No write action allowed on closed projects
                   return false
                 end
                 # No action allowed on disabled modules
                 if action.is_a? Hash
                   allowed_actions.include? "#{action[:controller]}/#{action[:action]}"
                 else
                   allowed_permissions.include? action
                 end
               end
               # Return the enabled module with the given name
               # or nil if the module is not enabled for the project
               def enabled_module(name)
                 name = name.to_s
                 enabled_modules.detect {|m| m.name == name}
               end
               # Return true if the module with the given name is enabled
               def module_enabled?(name)
                 enabled_module(name).present?
               end
               def enabled_module_names=(module_names)
                 if module_names && module_names.is_a?(Array)
                   module_names = module_names.collect(&:to_s).reject(&:blank?)
                   self.enabled_modules = module_names.collect {|name| enabled_modules.detect {|mod| mod.name == name} || EnabledModule.new(:name => name)}
                 else
                   enabled_modules.clear
                 end
               end
               # Returns an array of the enabled modules names
               def enabled_module_names
                 enabled_modules.collect(&:name)
               end
               # Enable a specific module
               #
               # Examples:
               #   project.enable_module!(:issue_tracking)
               #   project.enable_module!("issue_tracking")
               def enable_module!(name)
                 enabled_modules << EnabledModule.new(:name => name.to_s) unless module_enabled?(name)
               end
               # Disable a module if it exists
               #
               # Examples:
               #   project.disable_module!(:issue_tracking)
               #   project.disable_module!("issue_tracking")
               #   project.disable_module!(project.enabled_modules.first)
               def disable_module!(target)
                 target = enabled_modules.detect{|mod| target.to_s == mod.name} unless enabled_modules.include?(target)
                 target.destroy unless target.blank?
               end
               safe_attributes 'name',
                 'description',
                 'homepage',
                 'is_public',
                 'identifier',
                 'custom_field_values',
                 'custom_fields',
                 'tracker_ids',
                 'issue_custom_field_ids'
               safe_attributes 'enabled_module_names',
                 :if => lambda {|project, user| project.new_record? || user.allowed_to?(:select_project_modules, project) }
               safe_attributes 'inherit_members',
                 :if => lambda {|project, user| project.parent.nil? || project.parent.visible?(user)}
               # Returns an array of projects that are in this project's hierarchy
               #
               # Example: parents, children, siblings
               def hierarchy
                 parents = project.self_and_ancestors || []
                 descendants = project.descendants || []
                 project_hierarchy = parents | descendants # Set union
               end
               # Returns an auto-generated project identifier based on the last identifier used
               def self.next_identifier
                 p = Project.order('id DESC').first
                 p.nil? ? nil : p.identifier.to_s.succ
               end
               # Copies and saves the Project instance based on the +project+.
               # Duplicates the source project's:
               # * Wiki
               # * Versions
               # * Categories
               # * Issues
               # * Members
               # * Queries
               #
               # Accepts an +options+ argument to specify what to copy
               #
               # Examples:
               #   project.copy(1)                                    # => copies everything
               #   project.copy(1, :only => 'members')                # => copies members only
               #   project.copy(1, :only => ['members', 'versions'])  # => copies members and versions
               def copy(project, options={})
                 project = project.is_a?(Project) ? project : Project.find(project)
                 to_be_copied = %w(wiki versions issue_categories issues members queries boards)
                 to_be_copied = to_be_copied & Array.wrap(options[:only]) unless options[:only].nil?
                 Project.transaction do
                   if save
                     reload
                     to_be_copied.each do |name|
                       send "copy_#{name}", project
                     end
                     Redmine::Hook.call_hook(:model_project_copy_before_save, :source_project => project, :destination_project => self)
                     save
                   end
                 end
                 true
               end
               # Returns a new unsaved Project instance with attributes copied from +project+
               def self.copy_from(project)
                 project = project.is_a?(Project) ? project : Project.find(project)
                 # clear unique attributes
                 attributes = project.attributes.dup.except('id', 'name', 'identifier', 'status', 'parent_id', 'lft', 'rgt')
                 copy = Project.new(attributes)
                 copy.enabled_modules = project.enabled_modules
                 copy.trackers = project.trackers
                 copy.custom_values = project.custom_values.collect {|v| v.clone}
                 copy.issue_custom_fields = project.issue_custom_fields
                 copy
               end
               # Yields the given block for each project with its level in the tree
               def self.project_tree(projects, &block)
                 ancestors = []
                 projects.sort_by(&:lft).each do |project|
                   while (ancestors.any? && !project.is_descendant_of?(ancestors.last))
                     ancestors.pop
                   end
                   yield project, ancestors.size
                   ancestors << project
                 end
               end
               private
               def after_parent_changed(parent_was)
                 remove_inherited_member_roles
                 add_inherited_member_roles
               end
               def update_inherited_members
                 if parent
                   if inherit_members? && !inherit_members_was
                     remove_inherited_member_roles
                     add_inherited_member_roles
                   elsif !inherit_members? && inherit_members_was
                     remove_inherited_member_roles
                   end
                 end
               end
               def remove_inherited_member_roles
                 member_roles = memberships.map(&:member_roles).flatten
                 member_role_ids = member_roles.map(&:id)
                 member_roles.each do |member_role|
                   if member_role.inherited_from && !member_role_ids.include?(member_role.inherited_from)
                     member_role.destroy
                   end
                 end
               end
               def add_inherited_member_roles
                 if inherit_members? && parent
                   parent.memberships.each do |parent_member|
                     member = Member.find_or_new(self.id, parent_member.user_id)
                     parent_member.member_roles.each do |parent_member_role|
                       member.member_roles << MemberRole.new(:role => parent_member_role.role, :inherited_from => parent_member_role.id)
                     end
                     member.save!
                   end
                 end
               end
               # Copies wiki from +project+
               def copy_wiki(project)
                 # Check that the source project has a wiki first
                 unless project.wiki.nil?
                   wiki = self.wiki || Wiki.new
                   wiki.attributes = project.wiki.attributes.dup.except("id", "project_id")
                   wiki_pages_map = {}
                   project.wiki.pages.each do |page|
                     # Skip pages without content
                     next if page.content.nil?
                     new_wiki_content = WikiContent.new(page.content.attributes.dup.except("id", "page_id", "updated_on"))
                     new_wiki_page = WikiPage.new(page.attributes.dup.except("id", "wiki_id", "created_on", "parent_id"))
                     new_wiki_page.content = new_wiki_content
                     wiki.pages << new_wiki_page
                     wiki_pages_map[page.id] = new_wiki_page
                   end
                   self.wiki = wiki
                   wiki.save
                   # Reproduce page hierarchy
                   project.wiki.pages.each do |page|
                     if page.parent_id && wiki_pages_map[page.id]
                       wiki_pages_map[page.id].parent = wiki_pages_map[page.parent_id]
                       wiki_pages_map[page.id].save
                     end
                   end
                 end
               end
               # Copies versions from +project+
               def copy_versions(project)
                 project.versions.each do |version|
                   new_version = Version.new
                   new_version.attributes = version.attributes.dup.except("id", "project_id", "created_on", "updated_on")
                   self.versions << new_version
                 end
               end
               # Copies issue categories from +project+
               def copy_issue_categories(project)
                 project.issue_categories.each do |issue_category|
                   new_issue_category = IssueCategory.new
                   new_issue_category.attributes = issue_category.attributes.dup.except("id", "project_id")
                   self.issue_categories << new_issue_category
                 end
               end
               # Copies issues from +project+
               def copy_issues(project)
                 # Stores the source issue id as a key and the copied issues as the
                 # value.  Used to map the two together for issue relations.
                 issues_map = {}
                 # Store status and reopen locked/closed versions
                 version_statuses = versions.reject(&:open?).map {|version| [version, version.status]}
                 version_statuses.each do |version, status|
                   version.update_attribute :status, 'open'
                 end
                 # Get issues sorted by root_id, lft so that parent issues
                 # get copied before their children
                 project.issues.reorder('root_id, lft').each do |issue|
                   new_issue = Issue.new
                   new_issue.copy_from(issue, :subtasks => false, :link => false)
                   new_issue.project = self
                   # Changing project resets the custom field values
                   # TODO: handle this in Issue#project=
                   new_issue.custom_field_values = issue.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
                   # Reassign fixed_versions by name, since names are unique per project
                   if issue.fixed_version && issue.fixed_version.project == project
                     new_issue.fixed_version = self.versions.detect {|v| v.name == issue.fixed_version.name}
                   end
                   # Reassign the category by name, since names are unique per project
                   if issue.category
                     new_issue.category = self.issue_categories.detect {|c| c.name == issue.category.name}
                   end
                   # Parent issue
                   if issue.parent_id
                     if copied_parent = issues_map[issue.parent_id]
                       new_issue.parent_issue_id = copied_parent.id
                     end
                   end
                   self.issues << new_issue
                   if new_issue.new_record?
                     logger.info "Project#copy_issues: issue ##{issue.id} could not be copied: #{new_issue.errors.full_messages}" if logger && logger.info
                   else
                     issues_map[issue.id] = new_issue unless new_issue.new_record?
                   end
                 end
                 # Restore locked/closed version statuses
                 version_statuses.each do |version, status|
                   version.update_attribute :status, status
                 end
                 # Relations after in case issues related each other
                 project.issues.each do |issue|
                   new_issue = issues_map[issue.id]
                   unless new_issue
                     # Issue was not copied
                     next
                   end
                   # Relations
                   issue.relations_from.each do |source_relation|
                     new_issue_relation = IssueRelation.new
                     new_issue_relation.attributes = source_relation.attributes.dup.except("id", "issue_from_id", "issue_to_id")
                     new_issue_relation.issue_to = issues_map[source_relation.issue_to_id]
                     if new_issue_relation.issue_to.nil? && Setting.cross_project_issue_relations?
                       new_issue_relation.issue_to = source_relation.issue_to
                     end
                     new_issue.relations_from << new_issue_relation
                   end
                   issue.relations_to.each do |source_relation|
                     new_issue_relation = IssueRelation.new
                     new_issue_relation.attributes = source_relation.attributes.dup.except("id", "issue_from_id", "issue_to_id")
                     new_issue_relation.issue_from = issues_map[source_relation.issue_from_id]
                     if new_issue_relation.issue_from.nil? && Setting.cross_project_issue_relations?
                       new_issue_relation.issue_from = source_relation.issue_from
                     end
                     new_issue.relations_to << new_issue_relation
                   end
                 end
               end
               # Copies members from +project+
               def copy_members(project)
                 # Copy users first, then groups to handle members with inherited and given roles
                 members_to_copy = []
                 members_to_copy += project.memberships.select {|m| m.principal.is_a?(User)}
                 members_to_copy += project.memberships.select {|m| !m.principal.is_a?(User)}
                 members_to_copy.each do |member|
                   new_member = Member.new
                   new_member.attributes = member.attributes.dup.except("id", "project_id", "created_on")
                   # only copy non inherited roles
                   # inherited roles will be added when copying the group membership
                   role_ids = member.member_roles.reject(&:inherited?).collect(&:role_id)
                   next if role_ids.empty?
                   new_member.role_ids = role_ids
                   new_member.project = self
                   self.members << new_member
                 end
               end
               # Copies queries from +project+
               def copy_queries(project)
                 project.queries.each do |query|
                   new_query = IssueQuery.new
                   new_query.attributes = query.attributes.dup.except("id", "project_id", "sort_criteria", "user_id", "type")
                   new_query.sort_criteria = query.sort_criteria if query.sort_criteria
                   new_query.project = self
                   new_query.user_id = query.user_id
                   new_query.role_ids = query.role_ids if query.visibility == IssueQuery::VISIBILITY_ROLES
                   self.queries << new_query
                 end
               end
               # Copies boards from +project+
               def copy_boards(project)
                 project.boards.each do |board|
                   new_board = Board.new
                   new_board.attributes = board.attributes.dup.except("id", "project_id", "topics_count", "messages_count", "last_message_id")
                   new_board.project = self
                   self.boards << new_board
                 end
               end
               def allowed_permissions
                 @allowed_permissions ||= begin
                   module_names = enabled_modules.loaded? ? enabled_modules.map(&:name) : enabled_modules.pluck(:name)
                   Redmine::AccessControl.modules_permissions(module_names).collect {|p| p.name}
                 end
               end
               def allowed_actions
                 @actions_allowed ||= allowed_permissions.inject([]) { |actions, permission| actions += Redmine::AccessControl.allowed_actions(permission) }.flatten
               end
               # Returns all the active Systemwide and project specific activities
               def active_activities
                 overridden_activity_ids = self.time_entry_activities.collect(&:parent_id)
                 if overridden_activity_ids.empty?
                   return TimeEntryActivity.shared.active
                 else
                   return system_activities_and_project_overrides
                 end
               end
               # Returns all the Systemwide and project specific activities
               # (inactive and active)
               def all_activities
                 overridden_activity_ids = self.time_entry_activities.collect(&:parent_id)
                 if overridden_activity_ids.empty?
                   return TimeEntryActivity.shared
                 else
                   return system_activities_and_project_overrides(true)
                 end
               end
               # Returns the systemwide active activities merged with the project specific overrides
               def system_activities_and_project_overrides(include_inactive=false)
                 t = TimeEntryActivity.table_name
                 scope = TimeEntryActivity.where(
                   "(#{t}.project_id IS NULL AND #{t}.id NOT IN (?)) OR (#{t}.project_id = ?)",
                   time_entry_activities.map(&:parent_id), id
                 )
                 unless include_inactive
                   scope = scope.active
                 end
                 scope
               end
               # Archives subprojects recursively
               def archive!
                 children.each do |subproject|
                   subproject.send :archive!
                 end
                 update_attribute :status, STATUS_ARCHIVED
               end
               def update_position_under_parent
                 set_or_update_position_under(parent)
               end
               public
               # Inserts/moves the project so that target's children or root projects stay alphabetically sorted
               def set_or_update_position_under(target_parent)
                 parent_was = parent
                 sibs = (target_parent.nil? ? self.class.roots : target_parent.children)
                 to_be_inserted_before = sibs.sort_by {|c| c.name.to_s.downcase}.detect {|c| c.name.to_s.downcase > name.to_s.downcase }
                 if to_be_inserted_before
                   move_to_left_of(to_be_inserted_before)
                 elsif target_parent.nil?
                   if sibs.empty?
                     # move_to_root adds the project in first (ie. left) position
                     move_to_root
                   else
                     move_to_right_of(sibs.last) unless self == sibs.last
                   end
                 else
                   # move_to_child_of adds the project in last (ie.right) position
                   move_to_child_of(target_parent)
                 end
                 if parent_was != target_parent
                   after_parent_changed(parent_was)
                 end
               end
             end

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