Added project specific Enumeration overrides.

These will be used to track if Enumeration's custom data or active state
is overridden on a project.  An overridden Enumeration is one that is associated
with a parent Enumeration.

  #4077

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2947 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20090403001910_add_project_to_enumerations.rb

@@ -0,0 +1,11 @@
+class AddProjectToEnumerations < ActiveRecord::Migration
+  def self.up
+    add_column :enumerations, :project_id, :integer, :null => true, :default => nil
+    add_index :enumerations, :project_id
+  end
+
+  def self.down
+    remove_index :enumerations, :project_id
+    remove_column :enumerations, :project_id
+  end
+end

db/migrate/20090406161854_add_parent_id_to_enumerations.rb

@@ -0,0 +1,9 @@
+class AddParentIdToEnumerations < ActiveRecord::Migration
+  def self.up
+    add_column :enumerations, :parent_id, :integer, :null => true, :default => nil
+  end
+
+  def self.down
+    remove_column :enumerations, :parent_id
+  end
+end