嵌套的对象W /复选框 - 大众分配甚至有accepts_nested_attributes_for？ [英] Nested Object w/ Checkboxes - mass-assignment even with accepts_nested_attributes_for?

问题描述

我觉得应该有一个简单的解决办法，考虑到Rails的2.3有这个新奇的嵌套形式的功能。基本上我要创建或更新一个用户，并在同一时间将它们分配角色。

好像我做的一切权利，但我得到的错误警告：不能批量分配这些保护属性：roles_attrributes

我甚至试图改变以用户[permissions_attrributes] [ROLE_ID]，因为我想，也许联接表是令人困惑的Rails。

不管怎么说，就如何实现这一实际工作有什么建议？

型号

 类用户的LT;的ActiveRecord :: Base的

  的has_many：权限
  的has_many：角色：通过=＆GT; ：权限

  accepts_nested_attributes_for：角色
  accepts_nested_attributes_for：权限
结束
 

从视图中摘录（请注意，我尝试和失败让fields_for产生什么，我想在这里，也许这是我的问题吗？）

 ＆LT;％在Role.all％GT的作用;
 ＆LT;％= check_box_tag（用户[roles_attrributes] [ID]，role.id）％＆GT;
 ＆其中;％= role.rolename％GT;
 ＆LT; BR /＆GT;
＆LT;％结束％GT;
 

PARAMS来到对面似乎是正确的：

  {用户=＆GT; {password_confirmation=＆gt;中[FILTERED]，
roles_attrributes=＆GT; {ID=＆gt;中2}，...
 

解决方案我的组合拼写错误，不使用attr_accessible，需要访问permissions_attributes和形式是稍微偏离。

型号：

 的has_many：权限：依赖=＆GT; ：破坏
的has_many：角色：通过=＆GT; ：权限
accepts_nested_attributes_for：权限
attr_accessible：permissions_attributes
 

查看：

 ＆LT;％Role.all（：为了=＆gt;中角色名ASC）。each_with_index办|作用，IDX | ％＆GT;
＆LT;％= check_box_tag（用户[permissions_attributes] [＃{IDX}] [ROLE_ID]，role.id）％＆GT;
＆其中;％= role.rolename％GT;
＆LT; BR /＆GT;
    ＆LT;％结束％GT;
 

解决方案

这听起来像这样的属性不标记为可安全更新。您应该能够解决它通过添加以下到你的模型类：

  attr_accessible：角色
 

或可能是：

  attr_accessible：roles_attributes
 

如果你看，你可能已经有一个attr_accessible呼叫时，可以将它添加到。欲了解更多信息，这是记录在这里：

http://api.rubyonrails.org/classes/ActiveRecord/Base。 HTML＃M002226

I thought that there should have been a simple solution to this, given that Rails 2.3 has this newfangled nested forms feature. Basically I want to create or update a user and assign them roles at the same time.

It seems like I'm doing everything right but I get the error WARNING: Can't mass-assign these protected attributes: roles_attrributes.

I even tried changing the view to user[permissions_attrributes][role_id] because I thought that maybe the join table was confusing Rails.

Anyways, any suggestions on how this should actually work?

Model

class User < ActiveRecord::Base

  has_many :permissions
  has_many :roles, :through => :permissions

  accepts_nested_attributes_for :roles
  accepts_nested_attributes_for :permissions
end

Excerpt from view (notice I tried and failed to get fields_for to generate what I want here, maybe that's my problem?)

<% for role in Role.all %>
 <%= check_box_tag( "user[roles_attrributes][id]",role.id) %>
 <%= role.rolename %>
 <br/>
<% end %>

Params coming across seem to be right:

    {"user"=>{"password_confirmation"=>"[FILTERED]", 
"roles_attrributes"=>{"id"=>"2"}, ...

Solution A combination of me misspelling, not using attr_accessible, needing to access permissions_attributes, and the form being slightly off.

Model:

has_many :permissions, :dependent => :destroy
has_many :roles, :through => :permissions
accepts_nested_attributes_for :permissions
attr_accessible :permissions_attributes

View:

    <%  Role.all(:order => "rolename ASC").each_with_index do |role,idx| %>
	<%= check_box_tag( "user[permissions_attributes][#{idx}][role_id]",role.id) %>
	<%= role.rolename %>
	<br/>
    <% end %>

解决方案

it sounds like this attribute isn't marked as safe for updating. You should be able to fix it by adding the following to your model class:

attr_accessible :roles

or possibly:

attr_accessible :roles_attributes

If you look, you may already have an attr_accessible call you can add this to. For more information this is documented here:

http://api.rubyonrails.org/classes/ActiveRecord/Base.html#M002226

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