jro_apps/redmine Commit - r5021:fba3d5d327c4

Adds Issue#visible_condition to build issue visibility statement....

Jean-Philippe Lang -

r5021:fba3d5d327c4

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r5021:fba3d5d327c4

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app/models/issue.rb +6 -1

             # Redmine - project management software
             # Copyright (C) 2006-2011  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
               belongs_to :project
               belongs_to :tracker
               belongs_to :status, :class_name => 'IssueStatus', :foreign_key => 'status_id'
               belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
               belongs_to :assigned_to, :class_name => 'User', :foreign_key => 'assigned_to_id'
               belongs_to :fixed_version, :class_name => 'Version', :foreign_key => 'fixed_version_id'
               belongs_to :priority, :class_name => 'IssuePriority', :foreign_key => 'priority_id'
               belongs_to :category, :class_name => 'IssueCategory', :foreign_key => 'category_id'
               has_many :journals, :as => :journalized, :dependent => :destroy
               has_many :time_entries, :dependent => :delete_all
               has_and_belongs_to_many :changesets, :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_remove => :attachment_removed
               acts_as_customizable
               acts_as_watchable
               acts_as_searchable :columns => ['subject', "#{table_name}.description", "#{Journal.table_name}.notes"],
                                  :include => [:project, :journals],
                                  # sort by id so that limited eager loading doesn't break with postgresql
                                  :order_column => "#{table_name}.id"
               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 :find_options => {:include => [:project, :author, :tracker]},
                                         :author_key => :author_id
               DONE_RATIO_OPTIONS = %w(issue_field issue_status)
               attr_reader :current_journal
               validates_presence_of :subject, :priority, :project, :tracker, :author, :status
               validates_length_of :subject, :maximum => 255
               validates_inclusion_of :done_ratio, :in => 0..100
               validates_numericality_of :estimated_hours, :allow_nil => true
               named_scope :visible, lambda {|*args| { :include => :project,
-                                                      :conditions => Project.allowed_to_condition(args.first || User.current, :view_issues) } }
+                                                      :conditions => Issue.visible_condition(args.first || User.current) } }
               named_scope :open, :conditions => ["#{IssueStatus.table_name}.is_closed = ?", false], :include => :status
               named_scope :recently_updated, :order => "#{Issue.table_name}.updated_on DESC"
               named_scope :with_limit, lambda { |limit| { :limit => limit} }
               named_scope :on_active_project, :include => [:status, :project, :tracker],
                                               :conditions => ["#{Project.table_name}.status=#{Project::STATUS_ACTIVE}"]
               named_scope :without_version, lambda {
                 {
                   :conditions => { :fixed_version_id => nil}
                 }
               }
               named_scope :with_query, lambda {|query|
                 {
                   :conditions => Query.merge_conditions(query.statement)
                 }
               }
               before_create :default_assign
               before_save :close_duplicates, :update_done_ratio_from_issue_status
               after_save :reschedule_following_issues, :update_nested_set_attributes, :update_parent_attributes, :create_journal
               after_destroy :update_parent_attributes
+              # 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)
+              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)
               end
               def after_initialize
                 if new_record?
                   # set default values for new records only
                   self.status ||= IssueStatus.default
                   self.priority ||= IssuePriority.default
                 end
               end
               # Overrides Redmine::Acts::Customizable::InstanceMethods#available_custom_fields
               def available_custom_fields
                 (project && tracker) ? project.all_issue_custom_fields.select {|c| tracker.custom_fields.include? c } : []
               end
               def copy_from(arg)
                 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
               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(*args)
                 ret = Issue.transaction do
                   move_to_project_without_transaction(*args) || raise(ActiveRecord::Rollback)
                 end || false
               end
               def move_to_project_without_transaction(new_project, new_tracker = nil, options = {})
                 options ||= {}
                 issue = options[:copy] ? self.class.new.copy_from(self) : self
                 if new_project && issue.project_id != new_project.id
                   # delete issue relations
                   unless Setting.cross_project_issue_relations?
                     issue.relations_from.clear
                     issue.relations_to.clear
                   end
                   # issue is moved to another project
                   # reassign to the category with same name if any
                   new_category = issue.category.nil? ? nil : new_project.issue_categories.find_by_name(issue.category.name)
                   issue.category = new_category
                   # Keep the fixed_version if it's still valid in the new_project
                   unless new_project.shared_versions.include?(issue.fixed_version)
                     issue.fixed_version = nil
                   end
                   issue.project = new_project
                   if issue.parent && issue.parent.project_id != issue.project_id
                     issue.parent_issue_id = nil
                   end
                 end
                 if new_tracker
                   issue.tracker = new_tracker
                   issue.reset_custom_values!
                 end
                 if options[:copy]
                   issue.custom_field_values = self.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
                   issue.status = if options[:attributes] && options[:attributes][:status_id]
                                    IssueStatus.find_by_id(options[:attributes][:status_id])
                                  else
                                    self.status
                                  end
                 end
                 # Allow bulk setting of attributes on the issue
                 if options[:attributes]
                   issue.attributes = options[:attributes]
                 end
                 if issue.save
                   unless options[:copy]
                     # Manually update project_id on related time entries
                     TimeEntry.update_all("project_id = #{new_project.id}", {:issue_id => id})
                     issue.children.each do |child|
                       unless child.move_to_project_without_transaction(new_project)
                         # Move failed and transaction was rollback'd
                         return false
                       end
                     end
                   end
                 else
                   return false
                 end
                 issue
               end
               def status_id=(sid)
                 self.status = nil
                 write_attribute(:status_id, sid)
               end
               def priority_id=(pid)
                 self.priority = nil
                 write_attribute(:priority_id, pid)
               end
               def tracker_id=(tid)
                 self.tracker = nil
                 result = write_attribute(:tracker_id, tid)
                 @custom_field_values = nil
                 result
               end
               # Overrides attributes= so that tracker_id gets assigned first
               def attributes_with_tracker_first=(new_attributes, *args)
                 return if new_attributes.nil?
                 new_tracker_id = new_attributes['tracker_id'] || new_attributes[:tracker_id]
                 if new_tracker_id
                   self.tracker_id = new_tracker_id
                 end
                 send :attributes_without_tracker_first=, new_attributes, *args
               end
               # Do not redefine alias chain on reload (see #4838)
               alias_method_chain(:attributes=, :tracker_first) unless method_defined?(:attributes_without_tracker_first=)
               def estimated_hours=(h)
                 write_attribute :estimated_hours, (h.is_a?(String) ? h.to_hours : h)
               end
               safe_attributes 'tracker_id',
                 'status_id',
                 'parent_issue_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',
                 :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',
                 :if => lambda {|issue, user| issue.new_statuses_allowed_to(user).any? }
               # 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
               # TODO: move workflow/permission checks from controllers to here
               def safe_attributes=(attrs, user=User.current)
                 return unless attrs.is_a?(Hash)
                 # User can change issue attributes only if he has :edit permission or if a workflow transition is allowed
                 attrs = delete_unsafe_attributes(attrs, user)
                 return if attrs.empty?
                 # Tracker must be set before since new_statuses_allowed_to depends on it.
                 if t = attrs.delete('tracker_id')
                   self.tracker_id = t
                 end
                 if attrs['status_id']
                   unless new_statuses_allowed_to(user).collect(&:id).include?(attrs['status_id'].to_i)
                     attrs.delete('status_id')
                   end
                 end
                 unless leaf?
                   attrs.reject! {|k,v| %w(priority_id done_ratio start_date due_date estimated_hours).include?(k)}
                 end
                 if attrs.has_key?('parent_issue_id')
                   if !user.allowed_to?(:manage_subtasks, project)
                     attrs.delete('parent_issue_id')
                   elsif !attrs['parent_issue_id'].blank?
                     attrs.delete('parent_issue_id') unless Issue.visible(user).exists?(attrs['parent_issue_id'].to_i)
                   end
                 end
                 self.attributes = attrs
               end
               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
                 if self.due_date.nil? && @attributes['due_date'] && !@attributes['due_date'].empty?
                   errors.add :due_date, :not_a_date
                 end
                 if self.due_date and self.start_date and self.due_date < self.start_date
                   errors.add :due_date, :greater_than_start_date
                 end
                 if start_date && soonest_start && start_date < soonest_start
                   errors.add :start_date, :invalid
                 end
                 if fixed_version
                   if !assignable_versions.include?(fixed_version)
                     errors.add :fixed_version_id, :inclusion
                   elsif reopened? && fixed_version.closed?
                     errors.add_to_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 @parent_issue
                   if @parent_issue.project_id != project_id
                     errors.add :parent_issue_id, :not_same_project
                   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, :not_a_valid_parent
                     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)
                 @issue_before_change = self.clone
                 @issue_before_change.status = self.status
                 @custom_values_before_change = {}
                 self.custom_values.each {|c| @custom_values_before_change.store c.custom_field_id, c.value }
                 # Make sure updated_on is updated when adding a note.
                 updated_on_will_change!
                 @current_journal
               end
               # Return true if the issue is closed, otherwise false
               def closed?
                 self.status.is_closed?
               end
               # Return true if the issue is being reopened
               def reopened?
                 if !new_record? && status_id_changed?
                   status_was = IssueStatus.find_by_id(status_id_was)
                   status_new = IssueStatus.find_by_id(status_id)
                   if status_was && status_new && status_was.is_closed? && !status_new.is_closed?
                     return true
                   end
                 end
                 false
               end
               # Return true if the issue is being closed
               def closing?
                 if !new_record? && status_id_changed?
                   status_was = IssueStatus.find_by_id(status_id_was)
                   status_new = IssueStatus.find_by_id(status_id)
                   if status_was && status_new && !status_was.is_closed? && status_new.is_closed?
                     return true
                   end
                 end
                 false
               end
               # Returns true if the issue is overdue
               def overdue?
                 !due_date.nil? && (due_date < Date.today) && !status.is_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 << author if author
                 users.uniq.sort
               end
               # Versions that the issue can be assigned to
               def assignable_versions
                 @assignable_versions ||= (project.shared_versions.open + [Version.find_by_id(fixed_version_id_was)]).compact.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 status that user is able to apply
               def new_statuses_allowed_to(user, include_default=false)
                 statuses = status.find_new_statuses_allowed_to(
                   user.roles_for_project(project),
                   tracker,
                   author == user,
                   assigned_to_id_changed? ? assigned_to_id_was == user.id : assigned_to_id == user.id
                   )
                 statuses << status unless statuses.empty?
                 statuses << IssueStatus.default if include_default
                 statuses = statuses.uniq.sort
                 blocked? ? statuses.reject {|s| s.is_closed?} : statuses
               end
               # Returns the mail adresses of users that should be notified
               def recipients
                 notified = project.notified_users
                 # Author and assignee are always notified unless they have been
                 # locked or don't want to be notified
                 notified << author if author && author.active? && author.notify_about?(self)
                 notified << assigned_to if assigned_to && assigned_to.active? && assigned_to.notify_about?(self)
                 notified.uniq!
                 # Remove users that can not view the issue
                 notified.reject! {|user| !visible?(user)}
                 notified.collect(&:mail)
               end
               # Returns the total number of hours spent on this issue and its descendants
               #
               # Example:
               #   spent_hours => 0.0
               #   spent_hours => 50.2
               def spent_hours
                 @spent_hours ||= self_and_descendants.sum("#{TimeEntry.table_name}.hours", :include => :time_entries).to_f || 0.0
               end
               def relations
                 (relations_from + relations_to).sort
               end
               def all_dependent_issues(except=[])
                 except << self
                 dependencies = []
                 relations_from.each do |relation|
                   if relation.issue_to && !except.include?(relation.issue_to)
                     dependencies << relation.issue_to
                     dependencies += relation.issue_to.all_dependent_issues(except)
                   end
                 end
                 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
               def soonest_start
                 @soonest_start ||= (
                     relations_to.collect{|relation| relation.successor_soonest_start} +
                     ancestors.collect(&:soonest_start)
                   ).compact.max
               end
               def reschedule_after(date)
                 return if date.nil?
                 if leaf?
                   if start_date.nil? || start_date < date
                     self.start_date, self.due_date = date, date + duration
                     save
                   end
                 else
                   leaves.each do |leaf|
                     leaf.reschedule_after(date)
                   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
                 s = "issue status-#{status.position} priority-#{priority.position}"
                 s << ' closed' if closed?
                 s << ' overdue' if overdue?
                 s << ' created-by-me' if User.current.logged? && author_id == User.current.id
                 s << ' assigned-to-me' if User.current.logged? && assigned_to_id == User.current.id
                 s
               end
               # Saves an issue, time_entry, attachments, and a journal from the parameters
               # Returns false if save fails
               def save_issue_with_child_records(params, existing_time_entry=nil)
                 Issue.transaction do
                   if params[:time_entry] && (params[:time_entry][:hours].present? || params[:time_entry][:comments].present?) && User.current.allowed_to?(:log_time, project)
                     @time_entry = existing_time_entry || TimeEntry.new
                     @time_entry.project = project
                     @time_entry.issue = self
                     @time_entry.user = User.current
                     @time_entry.spent_on = Date.today
                     @time_entry.attributes = params[:time_entry]
                     self.time_entries << @time_entry
                   end
                   if valid?
                     attachments = Attachment.attach_files(self, params[:attachments])
                     attachments[:files].each {|a| @current_journal.details << JournalDetail.new(:property => 'attachment', :prop_key => a.id, :value => a.filename)}
                     # TODO: Rename hook
                     Redmine::Hook.call_hook(:controller_issues_edit_before_save, { :params => params, :issue => self, :time_entry => @time_entry, :journal => @current_journal})
                     begin
                       if save
                         # TODO: Rename hook
                         Redmine::Hook.call_hook(:controller_issues_edit_after_save, { :params => params, :issue => self, :time_entry => @time_entry, :journal => @current_journal})
                       else
                         raise ActiveRecord::Rollback
                       end
                     rescue ActiveRecord::StaleObjectError
                       attachments[:files].each(&:destroy)
                       errors.add_to_base l(:notice_locking_conflict)
                       raise ActiveRecord::Rollback
                     end
                   end
                 end
               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)
                 parent_issue_id = arg.blank? ? nil : arg.to_i
                 if parent_issue_id && @parent_issue = Issue.find_by_id(parent_issue_id)
                   @parent_issue.id
                 else
                   @parent_issue = nil
                   nil
                 end
               end
               def parent_issue_id
                 if instance_variable_defined? :@parent_issue
                   @parent_issue.nil? ? nil : @parent_issue.id
                 else
                   parent_id
                 end
               end
               # Extracted from the ReportsController.
               def self.by_tracker(project)
                 count_and_group_by(:project => project,
                                    :field => 'tracker_id',
                                    :joins => Tracker.table_name)
               end
               def self.by_version(project)
                 count_and_group_by(:project => project,
                                    :field => 'fixed_version_id',
                                    :joins => Version.table_name)
               end
               def self.by_priority(project)
                 count_and_group_by(:project => project,
                                    :field => 'priority_id',
                                    :joins => IssuePriority.table_name)
               end
               def self.by_category(project)
                 count_and_group_by(:project => project,
                                    :field => 'category_id',
                                    :joins => IssueCategory.table_name)
               end
               def self.by_assigned_to(project)
                 count_and_group_by(:project => project,
                                    :field => 'assigned_to_id',
                                    :joins => User.table_name)
               end
               def self.by_author(project)
                 count_and_group_by(:project => project,
                                    :field => 'author_id',
                                    :joins => User.table_name)
               end
               def self.by_subproject(project)
                 ActiveRecord::Base.connection.select_all("select    s.id as status_id,
                                                             s.is_closed as closed,
                                                             i.project_id as project_id,
                                                             count(i.id) as total
                                                           from
                                                             #{Issue.table_name} i, #{IssueStatus.table_name} s
                                                           where
                                                             i.status_id=s.id
                                                             and i.project_id IN (#{project.descendants.active.collect{|p| p.id}.join(',')})
                                                           group by s.id, s.is_closed, i.project_id") if project.descendants.active.any?
               end
               # End ReportsController extraction
               # Returns an array of projects that current user can move issues to
               def self.allowed_target_projects_on_move
                 projects = []
                 if User.current.admin?
                   # admin is allowed to move issues to any active (visible) project
                   projects = Project.visible.all
                 elsif User.current.logged?
                   if Role.non_member.allowed_to?(:move_issues)
                     projects = Project.visible.all
                   else
                     User.current.memberships.each {|m| projects << m.project if m.roles.detect {|r| r.allowed_to?(:move_issues)}}
                   end
                 end
                 projects
               end
               private
               def update_nested_set_attributes
                 if root_id.nil?
                   # issue was just created
                   self.root_id = (@parent_issue.nil? ? id : @parent_issue.root_id)
                   set_default_left_and_right
                   Issue.update_all("root_id = #{root_id}, lft = #{lft}, rgt = #{rgt}", ["id = ?", id])
                   if @parent_issue
                     move_to_child_of(@parent_issue)
                   end
                   reload
                 elsif parent_issue_id != parent_id
                   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)
                       reload
                     end
                     old_root_id = root_id
                     self.root_id = (@parent_issue.nil? ? id : @parent_issue.root_id )
                     target_maxright = nested_set_scope.maximum(right_column_name) || 0
                     offset = target_maxright + 1 - lft
                     Issue.update_all("root_id = #{root_id}, lft = lft + #{offset}, rgt = rgt + #{offset}",
                                       ["root_id = ? AND lft >= ? AND rgt <= ? ", old_root_id, lft, rgt])
                     self[left_column_name] = lft + offset
                     self[right_column_name] = rgt + offset
                     if @parent_issue
                       move_to_child_of(@parent_issue)
                     end
                   end
                   reload
                   # 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
                 remove_instance_variable(:@parent_issue) if instance_variable_defined?(:@parent_issue)
               end
               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.maximum("#{IssuePriority.table_name}.position", :include => :priority)
                     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.average(:estimated_hours).to_f
                       if average == 0
                         average = 1
                       end
                       done = p.leaves.sum("COALESCE(estimated_hours, #{average}) * (CASE WHEN is_closed = #{connection.quoted_true} THEN 100 ELSE COALESCE(done_ratio, 0) END)", :include => :status).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(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.all(:conditions => merge_conditions("#{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'",
                                                             conditions),
                           :include => [:project, :fixed_version]
                           ).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 attachment deletion
               def attachment_removed(obj)
                 journal = init_journal(User.current)
                 journal.details << JournalDetail.new(:property => 'attachment',
                                                      :prop_key => obj.id,
                                                      :old_value => obj.filename)
                 journal.save
               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 need 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
               # Saves the changes in a Journal
               # Called after_save
               def create_journal
                 if @current_journal
                   # attributes changes
                   (Issue.column_names - %w(id root_id lft rgt lock_version created_on updated_on)).each {|c|
                     @current_journal.details << JournalDetail.new(:property => 'attr',
                                                                   :prop_key => c,
                                                                   :old_value => @issue_before_change.send(c),
                                                                   :value => send(c)) unless send(c)==@issue_before_change.send(c)
                   }
                   # custom fields changes
                   custom_values.each {|c|
                     next if (@custom_values_before_change[c.custom_field_id]==c.value ||
                               (@custom_values_before_change[c.custom_field_id].blank? && c.value.blank?))
                     @current_journal.details << JournalDetail.new(:property => 'cf',
                                                                   :prop_key => c.custom_field_id,
                                                                   :old_value => @custom_values_before_change[c.custom_field_id],
                                                                   :value => c.value)
                   }
                   @current_journal.save
                   # reset current journal
                   init_journal @current_journal.user, @current_journal.notes
                 end
               end
               # Query generator for selecting groups of issue counts for a project
               # based on specific criteria
               #
               # Options
               # * project - Project to search in.
               # * field - String. Issue field to key off of in the grouping.
               # * joins - String. The table name to join against.
               def self.count_and_group_by(options)
                 project = options.delete(:project)
                 select_field = options.delete(:field)
                 joins = options.delete(:joins)
                 where = "i.#{select_field}=j.id"
                 ActiveRecord::Base.connection.select_all("select    s.id as status_id,
                                                             s.is_closed as closed,
                                                             j.id as #{select_field},
                                                             count(i.id) as total
                                                           from
                                                               #{Issue.table_name} i, #{IssueStatus.table_name} s, #{joins} j
                                                           where
                                                             i.status_id=s.id
                                                             and #{where}
                                                             and i.project_id=#{project.id}
                                                           group by s.id, s.is_closed, j.id")
               end
             end

app/models/query.rb +1 -1

             # Redmine - project management software
             # Copyright (C) 2006-2008  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 QueryColumn
               attr_accessor :name, :sortable, :groupable, :default_order
               include Redmine::I18n
               def initialize(name, options={})
                 self.name = name
                 self.sortable = options[:sortable]
                 self.groupable = options[:groupable] || false
                 if groupable == true
                   self.groupable = name.to_s
                 end
                 self.default_order = options[:default_order]
                 @caption_key = options[:caption] || "field_#{name}"
               end
               def caption
                 l(@caption_key)
               end
               # Returns true if the column is sortable, otherwise false
               def sortable?
                 !sortable.nil?
               end
               def value(issue)
                 issue.send name
               end
             end
             class QueryCustomFieldColumn < QueryColumn
               def initialize(custom_field)
                 self.name = "cf_#{custom_field.id}".to_sym
                 self.sortable = custom_field.order_statement || false
                 if %w(list date bool int).include?(custom_field.field_format)
                   self.groupable = custom_field.order_statement
                 end
                 self.groupable ||= false
                 @cf = custom_field
               end
               def caption
                 @cf.name
               end
               def custom_field
                 @cf
               end
               def value(issue)
                 cv = issue.custom_values.detect {|v| v.custom_field_id == @cf.id}
                 cv && @cf.cast_value(cv.value)
               end
             end
             class Query < ActiveRecord::Base
               class StatementInvalid < ::ActiveRecord::StatementInvalid
               end
               belongs_to :project
               belongs_to :user
               serialize :filters
               serialize :column_names
               serialize :sort_criteria, Array
               attr_protected :project_id, :user_id
               validates_presence_of :name, :on => :save
               validates_length_of :name, :maximum => 255
               @@operators = { "="   => :label_equals,
                               "!"   => :label_not_equals,
                               "o"   => :label_open_issues,
                               "c"   => :label_closed_issues,
                               "!*"  => :label_none,
                               "*"   => :label_all,
                               ">="  => :label_greater_or_equal,
                               "<="  => :label_less_or_equal,
                               "<t+" => :label_in_less_than,
                               ">t+" => :label_in_more_than,
                               "t+"  => :label_in,
                               "t"   => :label_today,
                               "w"   => :label_this_week,
                               ">t-" => :label_less_than_ago,
                               "<t-" => :label_more_than_ago,
                               "t-"  => :label_ago,
                               "~"   => :label_contains,
                               "!~"  => :label_not_contains }
               cattr_reader :operators
               @@operators_by_filter_type = { :list => [ "=", "!" ],
                                              :list_status => [ "o", "=", "!", "c", "*" ],
                                              :list_optional => [ "=", "!", "!*", "*" ],
                                              :list_subprojects => [ "*", "!*", "=" ],
                                              :date => [ "<t+", ">t+", "t+", "t", "w", ">t-", "<t-", "t-" ],
                                              :date_past => [ ">t-", "<t-", "t-", "t", "w" ],
                                              :string => [ "=", "~", "!", "!~" ],
                                              :text => [  "~", "!~" ],
                                              :integer => [ "=", ">=", "<=", "!*", "*" ] }
               cattr_reader :operators_by_filter_type
               @@available_columns = [
                 QueryColumn.new(:project, :sortable => "#{Project.table_name}.name", :groupable => true),
                 QueryColumn.new(:tracker, :sortable => "#{Tracker.table_name}.position", :groupable => true),
                 QueryColumn.new(:parent, :sortable => ["#{Issue.table_name}.root_id", "#{Issue.table_name}.lft ASC"], :default_order => 'desc', :caption => :field_parent_issue),
                 QueryColumn.new(:status, :sortable => "#{IssueStatus.table_name}.position", :groupable => true),
                 QueryColumn.new(:priority, :sortable => "#{IssuePriority.table_name}.position", :default_order => 'desc', :groupable => true),
                 QueryColumn.new(:subject, :sortable => "#{Issue.table_name}.subject"),
                 QueryColumn.new(:author),
                 QueryColumn.new(:assigned_to, :sortable => ["#{User.table_name}.lastname", "#{User.table_name}.firstname", "#{User.table_name}.id"], :groupable => true),
                 QueryColumn.new(:updated_on, :sortable => "#{Issue.table_name}.updated_on", :default_order => 'desc'),
                 QueryColumn.new(:category, :sortable => "#{IssueCategory.table_name}.name", :groupable => true),
                 QueryColumn.new(:fixed_version, :sortable => ["#{Version.table_name}.effective_date", "#{Version.table_name}.name"], :default_order => 'desc', :groupable => true),
                 QueryColumn.new(:start_date, :sortable => "#{Issue.table_name}.start_date"),
                 QueryColumn.new(:due_date, :sortable => "#{Issue.table_name}.due_date"),
                 QueryColumn.new(:estimated_hours, :sortable => "#{Issue.table_name}.estimated_hours"),
                 QueryColumn.new(:done_ratio, :sortable => "#{Issue.table_name}.done_ratio", :groupable => true),
                 QueryColumn.new(:created_on, :sortable => "#{Issue.table_name}.created_on", :default_order => 'desc'),
               ]
               cattr_reader :available_columns
               def initialize(attributes = nil)
                 super attributes
                 self.filters ||= { 'status_id' => {:operator => "o", :values => [""]} }
               end
               def after_initialize
                 # Store the fact that project is nil (used in #editable_by?)
                 @is_for_all = project.nil?
               end
               def validate
                 filters.each_key do |field|
                   errors.add label_for(field), :blank unless
                       # filter requires one or more values
                       (values_for(field) and !values_for(field).first.blank?) or
                       # filter doesn't require any value
                       ["o", "c", "!*", "*", "t", "w"].include? operator_for(field)
                 end if filters
               end
               def editable_by?(user)
                 return false unless user
                 # Admin can edit them all and regular users can edit their private queries
                 return true if user.admin? || (!is_public && self.user_id == user.id)
                 # Members can not edit public queries that are for all project (only admin is allowed to)
                 is_public && !@is_for_all && user.allowed_to?(:manage_public_queries, project)
               end
               def available_filters
                 return @available_filters if @available_filters
                 trackers = project.nil? ? Tracker.find(:all, :order => 'position') : project.rolled_up_trackers
                 @available_filters = { "status_id" => { :type => :list_status, :order => 1, :values => IssueStatus.find(:all, :order => 'position').collect{|s| [s.name, s.id.to_s] } },
                                        "tracker_id" => { :type => :list, :order => 2, :values => trackers.collect{|s| [s.name, s.id.to_s] } },
                                        "priority_id" => { :type => :list, :order => 3, :values => IssuePriority.all.collect{|s| [s.name, s.id.to_s] } },
                                        "subject" => { :type => :text, :order => 8 },
                                        "created_on" => { :type => :date_past, :order => 9 },
                                        "updated_on" => { :type => :date_past, :order => 10 },
                                        "start_date" => { :type => :date, :order => 11 },
                                        "due_date" => { :type => :date, :order => 12 },
                                        "estimated_hours" => { :type => :integer, :order => 13 },
                                        "done_ratio" =>  { :type => :integer, :order => 14 }}
                 user_values = []
                 user_values << ["<< #{l(:label_me)} >>", "me"] if User.current.logged?
                 if project
                   user_values += project.users.sort.collect{|s| [s.name, s.id.to_s] }
                 else
                   all_projects = Project.visible.all
                   if all_projects.any?
                     # members of visible projects
                     user_values += User.active.find(:all, :conditions => ["#{User.table_name}.id IN (SELECT DISTINCT user_id FROM members WHERE project_id IN (?))", all_projects.collect(&:id)]).sort.collect{|s| [s.name, s.id.to_s] }
                     # project filter
                     project_values = []
                     Project.project_tree(all_projects) do |p, level|
                       prefix = (level > 0 ? ('--' * level + ' ') : '')
                       project_values << ["#{prefix}#{p.name}", p.id.to_s]
                     end
                     @available_filters["project_id"] = { :type => :list, :order => 1, :values => project_values} unless project_values.empty?
                   end
                 end
                 @available_filters["assigned_to_id"] = { :type => :list_optional, :order => 4, :values => user_values } unless user_values.empty?
                 @available_filters["author_id"] = { :type => :list, :order => 5, :values => user_values } unless user_values.empty?
                 group_values = Group.all.collect {|g| [g.name, g.id.to_s] }
                 @available_filters["member_of_group"] = { :type => :list_optional, :order => 6, :values => group_values } unless group_values.empty?
                 role_values = Role.givable.collect {|r| [r.name, r.id.to_s] }
                 @available_filters["assigned_to_role"] = { :type => :list_optional, :order => 7, :values => role_values } unless role_values.empty?
                 if User.current.logged?
                   @available_filters["watcher_id"] = { :type => :list, :order => 15, :values => [["<< #{l(:label_me)} >>", "me"]] }
                 end
                 if project
                   # project specific filters
                   unless @project.issue_categories.empty?
                     @available_filters["category_id"] = { :type => :list_optional, :order => 6, :values => @project.issue_categories.collect{|s| [s.name, s.id.to_s] } }
                   end
                   unless @project.shared_versions.empty?
                     @available_filters["fixed_version_id"] = { :type => :list_optional, :order => 7, :values => @project.shared_versions.sort.collect{|s| ["#{s.project.name} - #{s.name}", s.id.to_s] } }
                   end
                   unless @project.descendants.active.empty?
                     @available_filters["subproject_id"] = { :type => :list_subprojects, :order => 13, :values => @project.descendants.visible.collect{|s| [s.name, s.id.to_s] } }
                   end
                   add_custom_fields_filters(@project.all_issue_custom_fields)
                 else
                   # global filters for cross project issue list
                   system_shared_versions = Version.visible.find_all_by_sharing('system')
                   unless system_shared_versions.empty?
                     @available_filters["fixed_version_id"] = { :type => :list_optional, :order => 7, :values => system_shared_versions.sort.collect{|s| ["#{s.project.name} - #{s.name}", s.id.to_s] } }
                   end
                   add_custom_fields_filters(IssueCustomField.find(:all, :conditions => {:is_filter => true, :is_for_all => true}))
                 end
                 @available_filters
               end
               def add_filter(field, operator, values)
                 # values must be an array
                 return unless values and values.is_a? Array # and !values.first.empty?
                 # check if field is defined as an available filter
                 if available_filters.has_key? field
                   filter_options = available_filters[field]
                   # check if operator is allowed for that filter
                   #if @@operators_by_filter_type[filter_options[:type]].include? operator
                   #  allowed_values = values & ([""] + (filter_options[:values] || []).collect {|val| val[1]})
                   #  filters[field] = {:operator => operator, :values => allowed_values } if (allowed_values.first and !allowed_values.first.empty?) or ["o", "c", "!*", "*", "t"].include? operator
                   #end
                   filters[field] = {:operator => operator, :values => values }
                 end
               end
               def add_short_filter(field, expression)
                 return unless expression
                 parms = expression.scan(/^(o|c|!\*|!|\*)?(.*)$/).first
                 add_filter field, (parms[0] || "="), [parms[1] || ""]
               end
               # Add multiple filters using +add_filter+
               def add_filters(fields, operators, values)
                 if fields.is_a?(Array) && operators.is_a?(Hash) && values.is_a?(Hash)
                   fields.each do |field|
                     add_filter(field, operators[field], values[field])
                   end
                 end
               end
               def has_filter?(field)
                 filters and filters[field]
               end
               def operator_for(field)
                 has_filter?(field) ? filters[field][:operator] : nil
               end
               def values_for(field)
                 has_filter?(field) ? filters[field][:values] : nil
               end
               def label_for(field)
                 label = available_filters[field][:name] if available_filters.has_key?(field)
                 label ||= field.gsub(/\_id$/, "")
               end
               def available_columns
                 return @available_columns if @available_columns
                 @available_columns = Query.available_columns
                 @available_columns += (project ?
                                         project.all_issue_custom_fields :
                                         IssueCustomField.find(:all)
                                        ).collect {|cf| QueryCustomFieldColumn.new(cf) }
               end
               def self.available_columns=(v)
                 self.available_columns = (v)
               end
               def self.add_available_column(column)
                 self.available_columns << (column) if column.is_a?(QueryColumn)
               end
               # Returns an array of columns that can be used to group the results
               def groupable_columns
                 available_columns.select {|c| c.groupable}
               end
               # Returns a Hash of columns and the key for sorting
               def sortable_columns
                 {'id' => "#{Issue.table_name}.id"}.merge(available_columns.inject({}) {|h, column|
                                                            h[column.name.to_s] = column.sortable
                                                            h
                                                          })
               end
               def columns
                 if has_default_columns?
                   available_columns.select do |c|
                     # Adds the project column by default for cross-project lists
                     Setting.issue_list_default_columns.include?(c.name.to_s) || (c.name == :project && project.nil?)
                   end
                 else
                   # preserve the column_names order
                   column_names.collect {|name| available_columns.find {|col| col.name == name}}.compact
                 end
               end
               def column_names=(names)
                 if names
                   names = names.select {|n| n.is_a?(Symbol) || !n.blank? }
                   names = names.collect {|n| n.is_a?(Symbol) ? n : n.to_sym }
                   # Set column_names to nil if default columns
                   if names.map(&:to_s) == Setting.issue_list_default_columns
                     names = nil
                   end
                 end
                 write_attribute(:column_names, names)
               end
               def has_column?(column)
                 column_names && column_names.include?(column.name)
               end
               def has_default_columns?
                 column_names.nil? || column_names.empty?
               end
               def sort_criteria=(arg)
                 c = []
                 if arg.is_a?(Hash)
                   arg = arg.keys.sort.collect {|k| arg[k]}
                 end
                 c = arg.select {|k,o| !k.to_s.blank?}.slice(0,3).collect {|k,o| [k.to_s, o == 'desc' ? o : 'asc']}
                 write_attribute(:sort_criteria, c)
               end
               def sort_criteria
                 read_attribute(:sort_criteria) || []
               end
               def sort_criteria_key(arg)
                 sort_criteria && sort_criteria[arg] && sort_criteria[arg].first
               end
               def sort_criteria_order(arg)
                 sort_criteria && sort_criteria[arg] && sort_criteria[arg].last
               end
               # Returns the SQL sort order that should be prepended for grouping
               def group_by_sort_order
                 if grouped? && (column = group_by_column)
                   column.sortable.is_a?(Array) ?
                     column.sortable.collect {|s| "#{s} #{column.default_order}"}.join(',') :
                     "#{column.sortable} #{column.default_order}"
                 end
               end
               # Returns true if the query is a grouped query
               def grouped?
                 !group_by_column.nil?
               end
               def group_by_column
                 groupable_columns.detect {|c| c.groupable && c.name.to_s == group_by}
               end
               def group_by_statement
                 group_by_column.try(:groupable)
               end
               def project_statement
                 project_clauses = []
                 if project && !@project.descendants.active.empty?
                   ids = [project.id]
                   if has_filter?("subproject_id")
                     case operator_for("subproject_id")
                     when '='
                       # include the selected subprojects
                       ids += values_for("subproject_id").each(&:to_i)
                     when '!*'
                       # main project only
                     else
                       # all subprojects
                       ids += project.descendants.collect(&:id)
                     end
                   elsif Setting.display_subprojects_issues?
                     ids += project.descendants.collect(&:id)
                   end
                   project_clauses << "#{Project.table_name}.id IN (%s)" % ids.join(',')
                 elsif project
                   project_clauses << "#{Project.table_name}.id = %d" % project.id
                 end
-                project_clauses <<  Project.allowed_to_condition(User.current, :view_issues)
+                project_clauses <<  Issue.visible_condition(User.current)
                 project_clauses.join(' AND ')
               end
               def statement
                 # filters clauses
                 filters_clauses = []
                 filters.each_key do |field|
                   next if field == "subproject_id"
                   v = values_for(field).clone
                   next unless v and !v.empty?
                   operator = operator_for(field)
                   # "me" value subsitution
                   if %w(assigned_to_id author_id watcher_id).include?(field)
                     v.push(User.current.logged? ? User.current.id.to_s : "0") if v.delete("me")
                   end
                   sql = ''
                   if field =~ /^cf_(\d+)$/
                     # custom field
                     db_table = CustomValue.table_name
                     db_field = 'value'
                     is_custom_filter = true
                     sql << "#{Issue.table_name}.id IN (SELECT #{Issue.table_name}.id FROM #{Issue.table_name} LEFT OUTER JOIN #{db_table} ON #{db_table}.customized_type='Issue' AND #{db_table}.customized_id=#{Issue.table_name}.id AND #{db_table}.custom_field_id=#{$1} WHERE "
                     sql << sql_for_field(field, operator, v, db_table, db_field, true) + ')'
                   elsif field == 'watcher_id'
                     db_table = Watcher.table_name
                     db_field = 'user_id'
                     sql << "#{Issue.table_name}.id #{ operator == '=' ? 'IN' : 'NOT IN' } (SELECT #{db_table}.watchable_id FROM #{db_table} WHERE #{db_table}.watchable_type='Issue' AND "
                     sql << sql_for_field(field, '=', v, db_table, db_field) + ')'
                   elsif field == "member_of_group" # named field
                     if operator == '*' # Any group
                       groups = Group.all
                       operator = '=' # Override the operator since we want to find by assigned_to
                     elsif operator == "!*"
                       groups = Group.all
                       operator = '!' # Override the operator since we want to find by assigned_to
                     else
                       groups = Group.find_all_by_id(v)
                     end
                     groups ||= []
                     members_of_groups = groups.inject([]) {|user_ids, group|
                       if group && group.user_ids.present?
                         user_ids << group.user_ids
                       end
                       user_ids.flatten.uniq.compact
                     }.sort.collect(&:to_s)
                     sql << '(' + sql_for_field("assigned_to_id", operator, members_of_groups, Issue.table_name, "assigned_to_id", false) + ')'
                   elsif field == "assigned_to_role" # named field
                     if operator == "*" # Any Role
                       roles = Role.givable
                       operator = '=' # Override the operator since we want to find by assigned_to
                     elsif operator == "!*" # No role
                       roles = Role.givable
                       operator = '!' # Override the operator since we want to find by assigned_to
                     else
                       roles = Role.givable.find_all_by_id(v)
                     end
                     roles ||= []
                     members_of_roles = roles.inject([]) {|user_ids, role|
                       if role && role.members
                         user_ids << role.members.collect(&:user_id)
                       end
                       user_ids.flatten.uniq.compact
                     }.sort.collect(&:to_s)
                     sql << '(' + sql_for_field("assigned_to_id", operator, members_of_roles, Issue.table_name, "assigned_to_id", false) + ')'
                   else
                     # regular field
                     db_table = Issue.table_name
                     db_field = field
                     sql << '(' + sql_for_field(field, operator, v, db_table, db_field) + ')'
                   end
                   filters_clauses << sql
                 end if filters and valid?
                 (filters_clauses << project_statement).join(' AND ')
               end
               # Returns the issue count
               def issue_count
                 Issue.count(:include => [:status, :project], :conditions => statement)
               rescue ::ActiveRecord::StatementInvalid => e
                 raise StatementInvalid.new(e.message)
               end
               # Returns the issue count by group or nil if query is not grouped
               def issue_count_by_group
                 r = nil
                 if grouped?
                   begin
                     # Rails will raise an (unexpected) RecordNotFound if there's only a nil group value
                     r = Issue.count(:group => group_by_statement, :include => [:status, :project], :conditions => statement)
                   rescue ActiveRecord::RecordNotFound
                     r = {nil => issue_count}
                   end
                   c = group_by_column
                   if c.is_a?(QueryCustomFieldColumn)
                     r = r.keys.inject({}) {|h, k| h[c.custom_field.cast_value(k)] = r[k]; h}
                   end
                 end
                 r
               rescue ::ActiveRecord::StatementInvalid => e
                 raise StatementInvalid.new(e.message)
               end
               # Returns the issues
               # Valid options are :order, :offset, :limit, :include, :conditions
               def issues(options={})
                 order_option = [group_by_sort_order, options[:order]].reject {|s| s.blank?}.join(',')
                 order_option = nil if order_option.blank?
                 Issue.find :all, :include => ([:status, :project] + (options[:include] || [])).uniq,
                                  :conditions => Query.merge_conditions(statement, options[:conditions]),
                                  :order => order_option,
                                  :limit  => options[:limit],
                                  :offset => options[:offset]
               rescue ::ActiveRecord::StatementInvalid => e
                 raise StatementInvalid.new(e.message)
               end
               # Returns the journals
               # Valid options are :order, :offset, :limit
               def journals(options={})
                 Journal.find :all, :include => [:details, :user, {:issue => [:project, :author, :tracker, :status]}],
                                    :conditions => statement,
                                    :order => options[:order],
                                    :limit => options[:limit],
                                    :offset => options[:offset]
               rescue ::ActiveRecord::StatementInvalid => e
                 raise StatementInvalid.new(e.message)
               end
               # Returns the versions
               # Valid options are :conditions
               def versions(options={})
                 Version.find :all, :include => :project,
                                    :conditions => Query.merge_conditions(project_statement, options[:conditions])
               rescue ::ActiveRecord::StatementInvalid => e
                 raise StatementInvalid.new(e.message)
               end
               private
               # Helper method to generate the WHERE sql for a +field+, +operator+ and a +value+
               def sql_for_field(field, operator, value, db_table, db_field, is_custom_filter=false)
                 sql = ''
                 case operator
                 when "="
                   if value.any?
                     sql = "#{db_table}.#{db_field} IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + ")"
                   else
                     # IN an empty set
                     sql = "1=0"
                   end
                 when "!"
                   if value.any?
                     sql = "(#{db_table}.#{db_field} IS NULL OR #{db_table}.#{db_field} NOT IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + "))"
                   else
                     # NOT IN an empty set
                     sql = "1=1"
                   end
                 when "!*"
                   sql = "#{db_table}.#{db_field} IS NULL"
                   sql << " OR #{db_table}.#{db_field} = ''" if is_custom_filter
                 when "*"
                   sql = "#{db_table}.#{db_field} IS NOT NULL"
                   sql << " AND #{db_table}.#{db_field} <> ''" if is_custom_filter
                 when ">="
                   sql = "#{db_table}.#{db_field} >= #{value.first.to_i}"
                 when "<="
                   sql = "#{db_table}.#{db_field} <= #{value.first.to_i}"
                 when "o"
                   sql = "#{IssueStatus.table_name}.is_closed=#{connection.quoted_false}" if field == "status_id"
                 when "c"
                   sql = "#{IssueStatus.table_name}.is_closed=#{connection.quoted_true}" if field == "status_id"
                 when ">t-"
                   sql = date_range_clause(db_table, db_field, - value.first.to_i, 0)
                 when "<t-"
                   sql = date_range_clause(db_table, db_field, nil, - value.first.to_i)
                 when "t-"
                   sql = date_range_clause(db_table, db_field, - value.first.to_i, - value.first.to_i)
                 when ">t+"
                   sql = date_range_clause(db_table, db_field, value.first.to_i, nil)
                 when "<t+"
                   sql = date_range_clause(db_table, db_field, 0, value.first.to_i)
                 when "t+"
                   sql = date_range_clause(db_table, db_field, value.first.to_i, value.first.to_i)
                 when "t"
                   sql = date_range_clause(db_table, db_field, 0, 0)
                 when "w"
                   from = l(:general_first_day_of_week) == '7' ?
                   # week starts on sunday
                   ((Date.today.cwday == 7) ? Time.now.at_beginning_of_day : Time.now.at_beginning_of_week - 1.day) :
                     # week starts on monday (Rails default)
                     Time.now.at_beginning_of_week
                   sql = "#{db_table}.#{db_field} BETWEEN '%s' AND '%s'" % [connection.quoted_date(from), connection.quoted_date(from + 7.days)]
                 when "~"
                   sql = "LOWER(#{db_table}.#{db_field}) LIKE '%#{connection.quote_string(value.first.to_s.downcase)}%'"
                 when "!~"
                   sql = "LOWER(#{db_table}.#{db_field}) NOT LIKE '%#{connection.quote_string(value.first.to_s.downcase)}%'"
                 end
                 return sql
               end
               def add_custom_fields_filters(custom_fields)
                 @available_filters ||= {}
                 custom_fields.select(&:is_filter?).each do |field|
                   case field.field_format
                   when "text"
                     options = { :type => :text, :order => 20 }
                   when "list"
                     options = { :type => :list_optional, :values => field.possible_values, :order => 20}
                   when "date"
                     options = { :type => :date, :order => 20 }
                   when "bool"
                     options = { :type => :list, :values => [[l(:general_text_yes), "1"], [l(:general_text_no), "0"]], :order => 20 }
                   else
                     options = { :type => :string, :order => 20 }
                   end
                   @available_filters["cf_#{field.id}"] = options.merge({ :name => field.name })
                 end
               end
               # Returns a SQL clause for a date or datetime field.
               def date_range_clause(table, field, from, to)
                 s = []
                 if from
                   s << ("#{table}.#{field} > '%s'" % [connection.quoted_date((Date.yesterday + from).to_time.end_of_day)])
                 end
                 if to
                   s << ("#{table}.#{field} <= '%s'" % [connection.quoted_date((Date.today + to).to_time.end_of_day)])
                 end
                 s.join(' AND ')
               end
             end

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