class AddSendWindowToMailings < ActiveRecord::Migration[8.1]
  def change
    change_table :mailings do |t|
      t.boolean :send_window_enabled, default: false, null: false
      t.integer :send_window_start_minutes
      t.integer :send_window_end_minutes
      t.datetime :next_send_at
    end
    add_index :mailings, [:status, :next_send_at]
  end
end