class CreateUserMyModules < ActiveRecord::Migration def change create_table :user_my_modules do |t| t.integer :user_id, null: false t.integer :my_module_id, null: false t.timestamps null: false end add_foreign_key :user_my_modules, :users add_foreign_key :user_my_modules, :my_modules add_index :user_my_modules, :user_id add_index :user_my_modules, :my_module_id end end