class CreateStatusBookmark < ActiveRecord::Migration[5.2] def change create_table :status_bookmarks do |t| t.timestamps t.belongs_to :account, foreign_key: { on_delete: :cascade }, null: false t.belongs_to :status, foreign_key: { on_delete: :cascade }, null: false end add_index :status_bookmarks, [:account_id, :status_id], unique: true end end