Missing inverse of has_many :though not detected

[catmando]

consider

      class Physician < ActiveRecord::Base
        has_many :appointments
        has_many :patients, through: :appointments
      end

      class Appointment < ActiveRecord::Base
        belongs_to :physician
        belongs_to :patient
      end

      class Patient < ActiveRecord::Base
        has_many :appointments
        has_many :physicians, through: :appointments
      end

now if we define Physician#patients as has_many :patients (i.e. without the through) and then do this:

   old_physician = Physician.find_by_name('Foo')
   new_patient = Patient.new(name: 'new guy')
   appt = Appointment.new(physician: old_physician, patient: new_patient)

we would find on the server that

  new_patient.physicians

is [<Physician name: Foo>]

but on the client the list is empty. So it seems that Rails is inferring (or not even caring about) the missing inverse has_many though: on Physician (since we are not accessing it), but hyperstack is failing for some reason.

Of course if we can infer the relationship (per Rails) that is great, but at least there should be a warning or error so you can fix it.