Rails has_many :通过保存额外的字段 [英] Rails has_many :through saving additional fields

问题描述

我正在尝试找到一种优雅的方式来保存约会模型中名为 description 的附加字段(如下所示).我的模型设置如下:

class Physician <ActiveRecord::Basehas_many : 约会has_many :患者, 通过: :appointments结尾班级预约

在我看来，我设置了复选框来保存联接表的数据，但我想在附加的描述"字段中滑动以与联接一起保存.以下是我的看法:

<字段集><legend>患者</legend><% @patients.each_slice(2) 做 |切片|％＞
<% slice.each do |患者|％＞
<%= label_tag "physician_patient_ids_#{patient.id}" do %><%= check_box_tag '医师[patient_ids][]',patient.id,@physician.patients.include?(患者)，{ id: "physician_patient_ids_#{patient.id}" } %><%=患者姓名%><%结束%><!-- 需要以某种方式在此处添加说明-->
<%结束%>
<%结束%></fieldset>

解决方案

您可以使用 accepts_nested_attributes_for 来更新关联属性.

在模型中:

accepts_nested_attributes_for :appointments, :allow_destroy =>真的

在视图中:

<%= f.fields_for :appointments do |apt|％＞<%= apt.object.patient.name %><%= apt.text_field :description %><%结束%>

参考 http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html

I am trying to find a graceful way of saving an additional field called description on the Appointment model (below). My models are setup like this:

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 Patients < ActiveRecord::Base
  has_many :appointments
  has_many :physicians, through: :appointments
  attr_accessible :name
end

In my view I have checkboxes setup to save the data for the join table but I want to slide in an additional "description" field to be saved with the join. Below is what is in my view:

<div class="field">
  <fieldset>
  <legend>Patients</legend>
  <% @patients.each_slice(2) do |slice| %>
    <div class='row'>
      <% slice.each do |patient| %>
        <div class='span3'>
          <%= label_tag "physician_patient_ids_#{patient.id}" do %>
            <%= check_box_tag 'physician[patient_ids][]', patient.id,
                              @physician.patients.include?(patient),
                              { id: "physician_patient_ids_#{patient.id}" } %>
            <%= patient.name %>
          <% end %>
          <!-- need to add in description here somehow -->
        </div>
      <% end %>
    </div>
  <% end %>
  </fieldset>
</div>

解决方案

You can use accepts_nested_attributes_for to update the association attributes.

In Model:

accepts_nested_attributes_for :appointments, :allow_destroy => true

In View:

<%= f.fields_for :appointments do |apt| %>
  <%= apt.object.patient.name %>
  <%= apt.text_field :description %>
<% end %>

Refer http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html

这篇关于Rails has_many :通过保存额外的字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！