ruby on rails - references - Rails has_many: a través de forma anidada

rails references

Question

Acabo de saltar a has_many :through asociación. Estoy tratando de implementar la capacidad de guardar datos para las 3 tablas ( Physician , Patient y tabla de asociación) a través de un solo formulario.

Mis migraciones:

class CreatePhysicians < ActiveRecord::Migration
  def self.up
    create_table :physicians do |t|
      t.string :name
      t.timestamps
    end
  end
end

class CreatePatients < ActiveRecord::Migration
  def self.up
    create_table :patients do |t|
      t.string :name
      t.timestamps
    end
  end
end

class CreateAppointments < ActiveRecord::Migration
  def self.up
    create_table :appointments do |t|
      t.integer :physician_id
      t.integer :patient_id
      t.date :appointment_date
      t.timestamps
    end
  end
end

Mis modelos:

class Patient < ActiveRecord::Base
  has_many :appointments
  has_many :physicians, :through => :appointments
  accepts_nested_attributes_for :appointments
  accepts_nested_attributes_for :physicians
end
class Physician < ActiveRecord::Base
  has_many :appointments
  has_many :patients, :through => :appointments
  accepts_nested_attributes_for :patients
  accepts_nested_attributes_for :appointments
end
class Appointment < ActiveRecord::Base
  belongs_to :physician
  belongs_to :patient
end

Mi controlador

def new
    @patient = Patient.new
    @patient.physicians.build
    @patient.appointments.build
end

Mi vista ( new.html.rb ):

<% form_for(@patient) do |patient_form| %>
  <%= patient_form.error_messages %>
  <p>
    <%= patient_form.label :name, "Patient Name" %>
    <%= patient_form.text_field :name %>
  </p>
  <%  patient_form.fields_for :physicians do |physician_form| %>
    <p>
      <%= physician_form.label :name, "Physician Name" %>
      <%= physician_form.text_field :name %>
    </p>
 <% end %>

  <p>
    <%= patient_form.submit ''Create'' %>
  </p>
<% end %>

<%= link_to ''Back'', patients_path %>

Puedo crear un nuevo registro de Patient , Physician y asociado para una Appointment , pero ahora quiero tener el campo para appointment_date también en forma. ¿Dónde debo colocar los campos para las Appointment y qué cambios se requieren en mi controlador? Intenté googlear y probé this , pero me quedé atascado en algún error u otro implementándolo.

Answer 1

"Lo tengo funcionando. Acabo de cambiar los modelos de la siguiente manera": citado por Shruti en los comentarios anteriores

class Patient < ActiveRecord::Base 
  has_many :appointments, :dependent => :destroy 
  has_many :physicians, :through => :appointments
  accepts_nested_attributes_for :appointments
end 

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

Answer 2

Ok, esta pequeña pregunta me dejó perplejo durante algunas horas, por lo que voy a publicar mi solución de trabajo aquí con la esperanza de que tenga tiempo para las personas. Esto es para Rails 4.0 y Ruby 2.0. Esto también superó un problema de "conversión de símbolos a enteros" que tenía.

Modelos:

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

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

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

Controlador:

def new
  @patient= Patient.new 
  @appointments = @patient.appointments.build
  @physician = @appointments.build_physician 
end

def create
  Patient.new(patient_params)
end


def patient_params
   params.require(:patient).permit(:id, appointments_attributes: [:id, :appointment_time, physician_attributes: [:id ] )
end

Ver

<% form_for(@patient) do |patient_form| %>
  <%= patient_form.error_messages %>
  <p>
    <%= patient_form.label :name, "Patient Name" %>
    <%= patient_form.text_field :name %>
  </p>

  <% patient_form.fields_for :appointments do |appointment_form| %>
    <p>
      <%= appointment_form.label :appointment_date, "Appointment Date" %>
      <%= appointment_form.date_field :appointment_date %>
    </p>

    <% appointment_form.fields_for :physician do |physician_form| %>
      <p>
        <%= physician_form.label :name, "Physician Name" %>
        <%= physician_form.text_field :name %>
      </p>
    <% end %>
  <% end %>

  <p>
    <%= patient_form.submit ''Create'' %>
  </p>
<% end %>

<%= link_to ''Back'', patients_path %>

Answer 3

Su clase de pacientes acepta atributos anidados tanto para médicos como para citas. Intente agregar otro método fields_for para la cita.

<% form_for(@patient) do |patient_form| %>
  <%= patient_form.error_messages %>
  <p>
    <%= patient_form.label :name, "Patient Name" %>
    <%= patient_form.text_field :name %>
  </p>

  <% patient_form.fields_for :physicians do |physician_form| %>
    <p>
      <%= physician_form.label :name, "Physician Name" %>
      <%= physician_form.text_field :name %>
    </p>
  <% end %>

  <% patient_form.fields_for :appointments do |appointment_form| %>
    <p>
      <%= appointment_form.label :appointment_date, "Appointment Date" %>
      <%= appointment_form.date_field :appointment_date %>
    </p>
  <% end %>

  <p>
    <%= patient_form.submit ''Create'' %>
  </p>
<% end %>

<%= link_to ''Back'', patients_path %>