ruby-on-railsrubyactiverecord

ActiveRecord exists? with associations

I have the following ActiveRecord call:

@payment = account.business.payments.find(params[:id])

Which searches through associations for a payment with id of params[:id]. However, this throws a RecordNotFound exception.

I'd like to call exists? instead to see if the record exists to avoid throwing an exception. Doing Payment.exists?(account.business.payments.find(params[:id])) does not work.

I'd like to search only the payments that belong_to that business, and not all payments by doing Payment.exists?(:id => params[:id]). That is so I can know that it's that particular account's business's payment.

How can I do that?

Note: account has_one business and business has_many payments.

Solution

  • Use where instead of find, it will return an ActiveRecord::Relation representing 0 or more records, off of which you can chain .exists?:

    @payments = account.business.payments.where(id: params[:id])


if @payments.exists?
  # ...
end