2012-02-25 77 views
6

我想通過以下的Rails Guide創造職位標籤:無法批量分配受保護的屬性:tags_attributes?

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 

的意見/職位/_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 %> 

的意見/標籤/ _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 %> 

但是當我嘗試創建標籤,我得到這個錯誤:

無法大規模指派保護屬性:tags_attributes Rails.root: /home/alex/rails/r7

Application Trace |框架跟蹤|充分跟蹤 應用程序/控制器/ posts_controller.rb:25:在`創建」請求

參數:

{ 「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「}

任何解決此問題的建議?

回答

13

只要把:tags_attributes而不是:標籤。請參閱下面。這將解決所面臨我的問題,因爲同樣的

class Post < ActiveRecord::Base 
attr_accessible :title, :content, :tags_attributes 
end 
6

這爲我工作:

class Post < ActiveRecord::Base 
    attr_accessible :name, :title, :content, :tags_attributes 
end 
1

這也爲我工作:

class Post < ActiveRecord::Base 
    attr_accessible :title, :content, :tags_attributes 
end 

這允許您訪問標記郵通屬性。

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