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不能批量分配受保护的属性:tags_attributes?
[英] Can't mass-assign protected attributes: tags_attributes?
本文介绍了不能批量分配受保护的属性:tags_attributes?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试按照 Rails 指南为帖子创建标签:
tag.rb:
class 标签
post.rb:
class Post 真的，:长度 =>{:最大=>30 },:唯一性 =>真的验证 :content, :presence =>真的，:唯一性 =>真的归属地:用户has_many :comments, :dependent =>:破坏has_many :votes, :as =>:votable, :dependent =>:破坏has_many :标签accepts_nested_attributes_for :tags, :allow_destroy =>:真的，:reject_if =>proc { |属性|attrs.all?{ |k, v|v.空白?} }结尾
views/posts/_form.html.erb:
<% @post.tags.build %><%= form_for(@post) 做 |post_form|％＞<%= 渲染 'shared/error_messages' %><div class="field"><%= post_form.label :title %><br/><%= post_form.text_field :title %>
<div class="field"><%= post_form.label :content %><br/><%= post_form.text_area :content %>
<h2>标签</h2><%=渲染:部分=>'标签/表单',:locals =>{:form =>post_form} %><div class="actions"><%= post_form.submit %>
<%结束%>
views/tags/_form.html.erb:
<%= form.fields_for :tags do |tag_form|％＞<div class="field"><%= tag_form.label :name, 'Tag:' %><%= tag_form.text_field :name %>
<% 除非 tag_form.object.nil?||tag_form.object.new_record?％＞<div class="field"><%= tag_form.label :_destroy, '删除:' %><%= tag_form.check_box :_destroy %>
<%结束%><%结束%>
但是当我尝试创建标签时出现此错误:
<块引用>
不能批量分配受保护的属性:tags_attributes Rails.root:/home/alex/rails/r7
应用程序跟踪 |框架跟踪 |完整跟踪app/controllers/posts_controller.rb:25:in `create' 请求
参数:
{"utf8"=>"✓","authenticity_token"=>"VF/qlfZ4Q5yvPY4VIbpFn65hoTAXdEa4fb4I1Ug4ETE=","post"=>{"title"=>"post number 5", "content"=>"post number 5 post5 号帖子 5", "tags_attributes"=>{"0"=>{"name"=>"food,饮料"}}},"提交"=>"创建帖子"}
有什么建议可以解决这个问题吗?
解决方案
Attr_accessible 指定不能批量分配属性.在这里，您还需要将 post_id 设为 attr_accessible.请参阅警告:无法批量分配受保护的属性
I'm trying to create tags for posts by following the Rails Guide:
tag.rb:
class Tag < ActiveRecord::Base
attr_accessible :name
belongs_to :post
end
post.rb:
class Post < ActiveRecord::Base
attr_accessible :title, :content, :tags
validates :title, :presence => true,
:length => { :maximum => 30 },
:uniqueness => true
validates :content, :presence => true,
:uniqueness => true
belongs_to :user
has_many :comments, :dependent => :destroy
has_many :votes, :as => :votable, :dependent => :destroy
has_many :tags
accepts_nested_attributes_for :tags, :allow_destroy => :true,
:reject_if => proc { |attrs| attrs.all? { |k, v| v.blank? } }
end
views/posts/_form.html.erb:
<% @post.tags.build %>
<%= form_for(@post) do |post_form| %>
<%= render 'shared/error_messages' %>
<div class="field">
<%= post_form.label :title %><br />
<%= post_form.text_field :title %>
</div>
<div class="field">
<%= post_form.label :content %><br />
<%= post_form.text_area :content %>
</div>
<h2>Tags</h2>
<%= render :partial => 'tags/form',
:locals => {:form => post_form} %>
<div class="actions">
<%= post_form.submit %>
</div>
<% end %>
views/tags/_form.html.erb:
<%= form.fields_for :tags do |tag_form| %>
<div class="field">
<%= tag_form.label :name, 'Tag:' %>
<%= tag_form.text_field :name %>
</div>
<% unless tag_form.object.nil? || tag_form.object.new_record? %>
<div class="field">
<%= tag_form.label :_destroy, 'Remove:' %>
<%= tag_form.check_box :_destroy %>
</div>
<% end %>
<% end %>
But I get this error when I try to create tags:
Can't mass-assign protected attributes: tags_attributes Rails.root:
/home/alex/rails/r7
Application Trace | Framework Trace | Full Trace
app/controllers/posts_controller.rb:25:in `create' Request
Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"VF/qlfZ4Q5yvPY4VIbpFn65hoTAXdEa4fb4I1Ug4ETE=",
"post"=>{"title"=>"post number 5", "content"=>"post number 5 post
number 5 post number 5", "tags_attributes"=>{"0"=>{"name"=>"food,
drinks"}}}, "commit"=>"Create Post"}
Any suggestions to fix this?
解决方案
Attr_accessible specifies that you can not mass assign attributes.
Here, you need to make post_id as attr_accessible as well.
Please refer WARNING: Can't mass-assign protected attributes
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