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# redMine - project management software
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# Copyright (C) 2006 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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class Enumeration < ActiveRecord::Base
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default_scope :order => "#{Enumeration.table_name}.position ASC"
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belongs_to :project
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acts_as_list :scope => 'type = \'#{type}\''
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acts_as_customizable
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acts_as_tree :order => 'position ASC'
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before_destroy :check_integrity
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validates_presence_of :name
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validates_uniqueness_of :name, :scope => [:type, :project_id]
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validates_length_of :name, :maximum => 30
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named_scope :shared, :conditions => { :project_id => nil }
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named_scope :active, :conditions => { :active => true }
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def self.default
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# Creates a fake default scope so Enumeration.default will check
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# it's type. STI subclasses will automatically add their own
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# types to the finder.
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if self.descends_from_active_record?
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find(:first, :conditions => { :is_default => true, :type => 'Enumeration' })
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else
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# STI classes are
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find(:first, :conditions => { :is_default => true })
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end
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end
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# Overloaded on concrete classes
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def option_name
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nil
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end
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def before_save
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if is_default? && is_default_changed?
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Enumeration.update_all("is_default = #{connection.quoted_false}", {:type => type})
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end
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end
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# Overloaded on concrete classes
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def objects_count
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0
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end
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def in_use?
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self.objects_count != 0
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end
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# Is this enumeration overiding a system level enumeration?
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def is_override?
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!self.parent.nil?
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end
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alias :destroy_without_reassign :destroy
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# Destroy the enumeration
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# If a enumeration is specified, objects are reassigned
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def destroy(reassign_to = nil)
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if reassign_to && reassign_to.is_a?(Enumeration)
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self.transfer_relations(reassign_to)
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end
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destroy_without_reassign
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end
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def <=>(enumeration)
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position <=> enumeration.position
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end
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def to_s; name end
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# Returns the Subclasses of Enumeration. Each Subclass needs to be
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# required in development mode.
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#
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# Note: subclasses is protected in ActiveRecord
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def self.get_subclasses
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@@subclasses[Enumeration]
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end
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# Does the +new+ Hash override the previous Enumeration?
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def self.overridding_change?(new, previous)
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if (same_active_state?(new['active'], previous.active)) && same_custom_values?(new,previous)
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return false
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else
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return true
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end
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end
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# Does the +new+ Hash have the same custom values as the previous Enumeration?
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def self.same_custom_values?(new, previous)
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previous.custom_field_values.each do |custom_value|
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if custom_value.value != new["custom_field_values"][custom_value.custom_field_id.to_s]
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return false
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end
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end
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return true
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end
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# Are the new and previous fields equal?
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def self.same_active_state?(new, previous)
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new = (new == "1" ? true : false)
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return new == previous
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end
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private
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def check_integrity
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raise "Can't delete enumeration" if self.in_use?
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end
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end
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# Force load the subclasses in development mode
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require_dependency 'time_entry_activity'
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require_dependency 'document_category'
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require_dependency 'issue_priority'
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