# This migration comes from dm_core (originally 20130207170247) class CreatePreferences < ActiveRecord::Migration def change create_table :preferences do |t| t.string :name, :null => false t.references :owner, :polymorphic => true, :null => false t.references :group, :polymorphic => true t.string :value t.timestamps null: true end add_index :preferences, [:owner_id, :owner_type, :name, :group_id, :group_type], :unique => true, :name => 'index_preferences_on_owner_and_name_and_preference' end end