如何在没有nested_form的情况下将表单写入has_many关联？

Question

I have a Patient model. And I want be able as a Patient adds multiple Doctors .

Usually how I do it by creates with nested_form for Patient(without any of his attributes)

# @patient = current_patient
= simple_nested_form_for @patient do |form|
  = form.simple_fields_for :doctors, @patient.doctors do |f|
    = f.input :first_name
    = f.input :last_name
  = form.link_to_add :add, :doctors
  = form.button :submit

And I am using PatientsController * #update * action to add and remove doctors from them.

I have already one PatientsController with edit action to edit Patient information.

I think right controller to add multiple Doctors to Patient should be DoctorsController . But this will not work with form above which always update Patient object.

So how this form should looks like? What is correct pattern for that?

Gem: https://github.com/ryanb/nested_form

Answer 1

Checkout Ryan's railscast #196 Nested Model Form (revised) where he shows what you are trying to do. Basically, instead of Patient and Doctors he uses Question and Answers. Jump to minute 10:00 to see it in action and confirm that is what you are looking for. The correct controller is Patients in this example.