scinote-web/db/migrate/20160928114915_create_user_notifications.rb

class CreateUserNotifications < ActiveRecord::Migration[4.2]
  def change
    create_table :user_notifications do |t|
      t.belongs_to :user, index: true, foreign_key: true
      t.belongs_to :notification, index: true, foreign_key: true
      t.boolean :checked, default: false, index: true

      t.timestamps null: false
    end
  end
end