ruby-on-rails Rails has_many：通过嵌套形式

vx6bjr1n 于 2023-03-04 发布在 Ruby

关注(0)|答案(3)|浏览(155)

我刚刚跳到has_many :through关联。我试图实现通过一个表单保存所有3个表（Physician，Patient和关联表）的数据的能力。

我的迁移：

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

我的模特：

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

我的控制器：

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

我的视图（`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 %>

我可以为Appointment创建一个新的Patient，Physician和相关的记录，但是现在我想在表单中也有appointment_date的字段。我应该把Appointment的字段放在哪里？在我的控制器中需要做什么改变？我试着在谷歌上搜索并尝试this，但是在实现它时遇到了一些或其他的错误。

ruby-on-rails

来源：https://stackoverflow.com/questions/13506735/rails-has-many-through-nested-form

3条答案

按热度按时间

gudnpqoy1#

好吧，这个小问题难倒了我几个小时，所以我打算在这里发布我的工作解决方案，希望它能为偷窥者节省一些时间。这是针对Rails 4.0和Ruby 2.0的。这也克服了我遇到的"符号到整数转换"的问题。

- 型号：**

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

- 控制器：**

# patients_controller.rb
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

- 查看**

<% 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 %>

赞(0）回复(0）举报 2023-03-04

agxfikkp2#

“我让它工作了。我只是按如下方式更改了模型”：在上述评论中引用自Shruti

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

赞(0）回复(0）举报 2023-03-04

2eafrhcq3#

您的patient类接受医生和预约的嵌套属性。请尝试为预约添加另一个fields_for方法。

<% 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 %>

赞(0）回复(0）举报 2023-03-04

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ruby-on-rails Rails has_many：通过嵌套形式

我的迁移：

我的模特：

我的控制器：

我的视图（`new.html.rb`）：

3条答案

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ruby-on-rails Rails has_many：通过嵌套形式

我的迁移：

我的模特：

我的控制器：

我的视图（new.html.rb）：

3条答案

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我的视图（`new.html.rb`）：