Appendix of the parent element at the stage of its establishment

[charlenef]

Ruby On Rails started studying, and in the course of the example, he faced this issue. A slope description of the structure: there are doctors, there are patients, there are services. Service records should be maintained. So the session has a doctor, a patient, a favor. Created medical models, services, patient. There's a question about the seance model. Got these connections:

class Appointment < ActiveRecord::Base
    belongs_to :doctor
    belongs_to :patient
    belongs_to :service
end
class Doctor < ActiveRecord::Base
    has_many :appointments
    has_many :patients, through: :appointments
end
class Patient < ActiveRecord::Base
    has_many :appointments
    has_many :doctors, through: :appointments
end
class Service < ActiveRecord::Base
    has_many :appointments
end

routes.rb

..
  resources :patients do
    resources :appointments
  end
  resources :doctors do
    resources :appointments
  end
  resources :services do
    resources :appointments
  end
  resources :appointments
..

appointment_form.html.erb

<%= form_for @appointment do |f| %>
        <%= f.label :doctor, "Доктор:"%>
        <%= select(:doctor, :doctor_id, Doctor.all.collect {|p| [ p.lastname, p.id ] }) %>
        <%= f.label :patient, "Пациент:"%>
        <%= select(:patient, :patient_id, Patient.all.collect {|p| [ p.lastname, p.id ] }) %>
        <%= f.label :service, "Услуга:"%>
        <%= select(:service, :service_id, Service.all.collect {|p| [ p.name, p.id ] }) %>
        <%= f.label :date, "Дата оказания:" %><br>
        <%= f.date_select :date %>
        <%=f.submit ("Сохранить") %>
<% end %>

appointments_controller.rb

class AppointmentsController < ApplicationController
    def new
        @appointment = Appointment.new
    end
    def create
        @patient = Patient.find(params[:patient][:patient_id])
        @doctor = Doctor.find(params[:doctor][:doctor_id])
        @service = Service.find(params[:service][:service_id])
        @appointment = @patient.appointments.new(appointment_params)
        if @appointment.save
            redirect_to @appointment
        else
            render 'new'
        end
    end
    private
        def appointment_params
            params.require(:appointment).permit(:date)
        end
end

---

Question: How do I add a session? Now, I'm in the patient's control room first, and I'm already adding a session, and in the end, only the fields of the patient and the day are filled in. How do you transfer the remaining fields (a doctor, a favor)?

[gionna]

In method create The addition of a doctor and a new session should be implemented:

def create
    @patient = Patient.find(params[:patient][:patient_id])
    @doctor = Doctor.find(params[:doctor][:doctor_id])
    @service = Service.find(params[:service][:service_id])
    @appointment = @patient.appointments.new(appointment_params)
if @appointment.save
    success = false                            #+++
    @doctor.appointments << @appointment       #+++
    if @doctor.save then success = true        #+++

    @service.appointments << @appointment      #+++
    if @service.save and success then          #+++
        redirect_to @appointment
    else                                       #+++
        render 'new'                           #+++
    end                                        #+++
else
    render 'new'
end

end