Question

我已经检查了类似问题的几个答案，似乎所有人都认为问题是attr_accessible，但我似乎无法让这个工作。

基本上我有用户＆amp;地址模型，并希望将Address属性指定为嵌套属性。但是当我保存它会导致下面显示的无法质量分配属性错误。

我在下面的代码中尝试过attr_accessible的许多变体，例如：addresses_attributes，：address_attributes，：primary_address_attributes ...我不确定它为什么不起作用，也许是因为它在Member模块声明中？

有人可以帮忙吗？

class Member::User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :token_authenticatable, :confirmable,
  # :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
  :recoverable, :rememberable, :trackable, :validatable

  # each user may have zero or many addresses
  # their primary email is also set as their login id.
  has_many :addresses

  has_one :address, :class_name => "Member::Address", :conditions => "is_primary = true"
  accepts_nested_attributes_for :addresses, :address

  # Setup accessible (or protected) attributes for your model
  attr_accessible :email, :password, :password_confirmation, :remember_me,     :address_attributes

   validates_presence_of :email 

end

我提交嵌套字段（相关部分）的表单

  <%= form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => {:class => "form-horizontal"}) do |f| %>
    <small>Mandatory fields marked *</small><br><br>
    <% devise_error_messages! %>
    <% flash.each do |name, msg| %>
      <div class="alert alert-<%= name == :notice ? "success" : "error" %>">
        <a class="close" data-dismiss="alert">×</a>
        <%= msg %>
      </div>
    <% end %>

    <%= f.fields_for resource.build_primary_address do |address_form| %> 
    <div class="control-group">
        <%= address_form.label :first_name, :class => "control-label" %>
        <div class="controls">
          <%= address_form.text_field :first_name, :class => "input-xlarge" %>
        </div>
      </div>

    <div class="control-group">
        <%= address_form.label :last_name, :class => "control-label" %>
        <div class="controls">
          <%= address_form.text_field :last_name, :class => "input-xlarge" %>
        </div>
      </div>
    <% end %>

错误显示：

 Can't mass-assign protected attributes: member_address

{"utf8"=>"✓",
 "authenticity_token"=>"HrZJG2krn15veUKJVh6PgEs4wwufaeRhciHcUIn6AaM=",
 "user"=>{"member_address"=>{"first_name"=>"asdf",
 "last_name"=>"asdfsafd"},
 "email"=>"Bob.JOnes@jones.com",
 "password"=>"[FILTERED]",
 "password_confirmation"=>"[FILTERED]"}}

Answer 1

为了让rails了解表单中提交的主要地址是嵌套属性，您必须明确告诉它这里的关系：

<%= f.fields_for :address, resource.build_primary_address do |address_form| %>

。原因是，因为您的模型名称的作用域为Member::，并且rails从类名称派生表单参数名称，所以在params哈希中最终使用：member_address而不是：address。因为：在这种情况下，地址是一个字段，其中：用户接受嵌套属性，：地址应表示为：params散列中的address_attributes，因此请确保后者出现在attr_accessible中。

Answer 2

添加

attr_accessible :member_address

到用户模型。

说明：要初始化ActiveRecord实例的每个哈希键必须声明为attr_accessible。查看您的哈希键有：

 "user"=>{"member_address"=>{ ... }}

初始化User实例的哈希中的

member_address键，因此它必须包含在attr_accessible语句中。

无法批量分配嵌套属性

2 个答案: