comparison app/models/.svn/text-base/enumeration.rb.svn-base @ 0:513646585e45

* Import Redmine trunk SVN rev 3859

+# redMine - project management software
+# Copyright (C) 2006  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 Enumeration < ActiveRecord::Base
+  default_scope :order => "#{Enumeration.table_name}.position ASC"
+  
+  belongs_to :project
+  
+  acts_as_list :scope => 'type = \'#{type}\''
+  acts_as_customizable
+  acts_as_tree :order => 'position ASC'
+
+  before_destroy :check_integrity
+  
+  validates_presence_of :name
+  validates_uniqueness_of :name, :scope => [:type, :project_id]
+  validates_length_of :name, :maximum => 30
+
+  named_scope :shared, :conditions => { :project_id => nil }
+  named_scope :active, :conditions => { :active => true }
+
+  def self.default
+    # Creates a fake default scope so Enumeration.default will check
+    # it's type.  STI subclasses will automatically add their own
+    # types to the finder.
+    if self.descends_from_active_record?
+      find(:first, :conditions => { :is_default => true, :type => 'Enumeration' })
+    else
+      # STI classes are
+      find(:first, :conditions => { :is_default => true })
+    end
+  end
+  
+  # Overloaded on concrete classes
+  def option_name
+    nil
+  end
+
+  def before_save
+    if is_default? && is_default_changed?
+      Enumeration.update_all("is_default = #{connection.quoted_false}", {:type => type})
+    end
+  end
+  
+  # Overloaded on concrete classes
+  def objects_count
+    0
+  end
+  
+  def in_use?
+    self.objects_count != 0
+  end
+
+  # Is this enumeration overiding a system level enumeration?
+  def is_override?
+    !self.parent.nil?
+  end
+  
+  alias :destroy_without_reassign :destroy
+  
+  # Destroy the enumeration
+  # If a enumeration is specified, objects are reassigned
+  def destroy(reassign_to = nil)
+    if reassign_to && reassign_to.is_a?(Enumeration)
+      self.transfer_relations(reassign_to)
+    end
+    destroy_without_reassign
+  end
+  
+  def <=>(enumeration)
+    position <=> enumeration.position
+  end
+  
+  def to_s; name end
+
+  # Returns the Subclasses of Enumeration.  Each Subclass needs to be
+  # required in development mode.
+  #
+  # Note: subclasses is protected in ActiveRecord
+  def self.get_subclasses
+    @@subclasses[Enumeration]
+  end
+
+  # Does the +new+ Hash override the previous Enumeration?
+  def self.overridding_change?(new, previous)
+    if (same_active_state?(new['active'], previous.active)) && same_custom_values?(new,previous)
+      return false
+    else
+      return true
+    end
+  end
+
+  # Does the +new+ Hash have the same custom values as the previous Enumeration?
+  def self.same_custom_values?(new, previous)
+    previous.custom_field_values.each do |custom_value|
+      if custom_value.value != new["custom_field_values"][custom_value.custom_field_id.to_s]
+        return false
+      end
+    end
+
+    return true
+  end
+  
+  # Are the new and previous fields equal?
+  def self.same_active_state?(new, previous)
+    new = (new == "1" ? true : false)
+    return new == previous
+  end
+  
+private
+  def check_integrity
+    raise "Can't delete enumeration" if self.in_use?
+  end
+
+end
+
+# Force load the subclasses in development mode
+require_dependency 'time_entry_activity'
+require_dependency 'document_category'
+require_dependency 'issue_priority'