94 lines
3.1 KiB
Ruby
94 lines
3.1 KiB
Ruby
# 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, :scope => :priorities},
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"DCAT" => {:label => :enumeration_doc_categories, :model => Document, :foreign_key => :category_id, :scope => :document_categories},
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"ACTI" => {:label => :enumeration_activities, :model => TimeEntry, :foreign_key => :activity_id, :scope => :activities}
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}.freeze
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# Creates a named scope for each type of value. The scope has a +default+ method
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# that returns the default value, or nil if no value is set as default.
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# Example:
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# Enumeration.priorities
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# Enumeration.priorities.default
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OPTIONS.each do |k, v|
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next unless v[:scope]
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named_scope v[:scope], :conditions => { :opt => k }, :order => 'position' do
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def default
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find(:first, :conditions => { :is_default => true })
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end
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end
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end
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named_scope :values, lambda {|opt| { :conditions => { :opt => opt }, :order => 'position' } } do
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def default
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find(:first, :conditions => { :is_default => true })
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end
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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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if is_default? && is_default_changed?
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Enumeration.update_all("is_default = #{connection.quoted_false}", {:opt => opt})
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end
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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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