Adds Enumeration custom field format (#21060).

Similar to List format but stores possible values as records.

git-svn-id: http://svn.redmine.org/redmine/trunk@14745 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20151025072118_create_custom_field_enumerations.rb

@@ -0,0 +1,10 @@
+class CreateCustomFieldEnumerations < ActiveRecord::Migration
+  def change
+    create_table :custom_field_enumerations do |t|
+      t.integer :custom_field_id, :null => false
+      t.string :name, :null => false
+      t.boolean :active, :default => true, :null => false
+      t.integer :position, :default => 1, :null => false
+    end
+  end
+end