接受 has_many 关系的嵌套属性 [英] accept nested attributes for has_many relationship

问题描述

下面是我的两个模型类

class Patient < ActiveRecord::Base
  belongs_to :user, :dependent => :destroy
  has_many :enrollments, :dependent => :destroy
  has_many :clients, :through => :enrollments

  accepts_nested_attributes_for :user
  accepts_nested_attributes_for :enrollments
  attr_accessible :user_attributes,:enrollments_attributes, :insurance
end

class Enrollment < ActiveRecord::Base
  belongs_to :client
  belongs_to :patient
  attr_accessible :client_id, :patient_id, :patient_id, :active 
end

在我的患者表单中，我想要一个多选框，可以将患者分配给客户.有没有办法做到这一点，所以我不必在控制器除了

In my patient form I would like to have a multi select box where a patient can be assigned to clients. Is there a way this can be done so I don't have to have any logic in the controller except for

@patient = Patient.new(params)
@patient.save

我已经试过了:

<%= patient_form.fields_for :enrollments do |enrollments_fields| %>
<tr>
    <td class="label">
        <%= enrollments_fields.label :client_id %>:                     
    </td>
    <td class="input">
        <%= enrollments_fields.collection_select(:client_id, @clients, :id, :name, {}, :multiple => true) %>
    </td>                   
</tr>
<% end %>

但它只保存了第一个客户端.如果我删除多个部分，它可以运行但我只能选择1个客户端！

But it only saves the first client. If I remove the multiple part, it functions but I can only select 1 client!

select的html值为:

The html value of the select is:

推荐答案

我最终做了以下事情:

<%= check_box_tag "patient[client_ids][]", client.id, @patient.clients.include?(client) %>

我不确定这是否是最好的方法...任何评论(我必须更新我的模型以包含 attr_accessible :client_ids

I am not sure if this is the best way...any comments (I had to update my model to include attr_accessible :client_ids

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