How do I 'validate' on destroy in rails

Question

On destruction of a restful resource, I want to guarantee a few things before I allow a destroy operation to continue? Basically, I want the ability to stop the destroy oper

Answer 1

It is what I did with Rails 5:

before_destroy do
  cannot_delete_with_qrcodes
  throw(:abort) if errors.present?
end

def cannot_delete_with_qrcodes
  errors.add(:base, 'Cannot delete shop with qrcodes') if qrcodes.any?
end