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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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acts_as_list :scope => 'opt = \'#{opt}\''
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before_destroy :check_integrity
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validates_presence_of :opt, :name
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validates_uniqueness_of :name, :scope => [:opt]
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validates_length_of :name, :maximum => 30
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# Single table inheritance would be an option
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OPTIONS = {
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"IPRI" => {:label => :enumeration_issue_priorities, :model => Issue, :foreign_key => :priority_id},
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"DCAT" => {:label => :enumeration_doc_categories, :model => Document, :foreign_key => :category_id},
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"ACTI" => {:label => :enumeration_activities, :model => TimeEntry, :foreign_key => :activity_id}
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}.freeze
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def self.get_values(option)
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find(:all, :conditions => {:opt => option}, :order => 'position')
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end
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def self.default(option)
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find(:first, :conditions => {:opt => option, :is_default => true}, :order => 'position')
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end
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def option_name
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OPTIONS[self.opt][:label]
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end
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def before_save
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Enumeration.update_all("is_default = #{connection.quoted_false}", {:opt => opt}) if is_default?
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end
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def objects_count
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OPTIONS[self.opt][:model].count(:conditions => "#{OPTIONS[self.opt][:foreign_key]} = #{id}")
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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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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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OPTIONS[self.opt][:model].update_all("#{OPTIONS[self.opt][:foreign_key]} = #{reassign_to.id}", "#{OPTIONS[self.opt][:foreign_key]} = #{id}")
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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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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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