ruby on rails - Has_many, Through: Saving Joiner Table Fail -

so have 3 classes:

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 

i trying create new patient record through existing physician record.

doctor = physician.first   sick_person = doctor.patients.new  sick_person.save 

what happening patient record gets saved joiner record, appointments, doesn't created. have been reading few forums , suggested use inverse_of (https://github.com/rails/rails/issues/6161#issuecomment-6330795, seems not right when using :through.

any body have ideas of how joiner table recorded? know create patient record first , create appointments record afterwards patient id, i'm wondering if there more of eloquent solution.

try:

doctor = physician.first sick_person = patient.new doctor.patients << sick_person