# frozen_string_literal: true class CreateStars < ActiveRecord::Migration[4.2] def change create_table :stars, id: false do |t| t.integer :parent_id, null: false t.string :parent_type, limit: 50, null: false t.integer :user_id, null: true t.timestamps null: false end add_index :stars, %i[parent_id parent_type user_id] end end