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