轨道上的ruby中的嵌套属性

我想在ruby中创建评论，但我有问题

1）posts_controller.rb

def comment Post.find(params[:id]).comments.create(params[:comment]) flash[:notice] = "Added your comment" redirect_to :action => "show", :id => params[:id] end 

2）show.html.erb

   "comment", :id => @post %> 
   

3）post.rb

 class Post include Mongoid::Document include Mongoid::Timestamps::Created include Mongoid::Timestamps::Updated field :title, type: String field :content, type: String field :user_id, type: Integer field :tag, type: String field :owner, type: String embeds_many :comments accepts_nested_attributes_for :comments end 

4）comment.rb

 class Comment include Mongoid::Document include Mongoid::Timestamps::Created include Mongoid::Timestamps::Updated field :owner, type: String field :message, type: String field :voteup, type: Integer field :votedown, type: Integer embedded_in :post end 

我用过mongoid

当我运行服务器有问题

路由错误

 No route matches {:action=>"comment", :id=>#, :controller=>"posts"} 

Answer 1

我会用：

 <%= form_tag :action => "comment", :controller => "posts" do %> <%= text_area "comment", "message" %>
 <%= submit_tag "Comment" %> <% end %> 

或者我会尝试使用form_for ：

 <%= form_for @post do |f| %> <%= f.fields_for :comments do |c| %> <%= c.text_area :message %>
 <% end %> <%= f.submit "Comment" %> <% end %> 

要使用字段，您必须在@post对象中填充注释，您可以在视图或控制器中执行此操作：

视图

 <% @post.comments.build %> 

或内联：

  <%= f.fields_for :comments, @post.comments.build do |c| %> 

调节器

在呈现表单的操作中：

 @post.comments.build 

如果您的记录未保存，则可能需要在模型中添加attr_accessible：

 class Post attr_accessible :comments_attributes