我已经成功地遵循了Ryan Bates在how to build a weblog in 15 minutes的初步教程.如果你不知道这个教程让你通过创建帖子并允许对这些帖子发表评论.它甚至通过在post.html.erb页面上创建和显示注释来引入AJAX.一切都很好.

这是打嗝,当Ryan带你通过本教程他清除comments_controller并且仅显示用于创建评论的代码.我试图添加编辑和销毁评论的能力.似乎不能让它工作,不断删除实际的帖子不是评论(日志显示我不断发送DELETE请求到PostsController).这是我的代码：

class CommentsController < ApplicationController
 def create
   @post = Post.find(params[:post_id])
   @comment = @post.comments.create!(params[:comment])
   respond_to do |format|
     format.html { redirect_to @post }
     format.js
   end
 end

 def destroy
    @comment = Comment.find(params[:id])
    @comment.destroy

    respond_to do |format|
      format.html { redirect_to(posts_url) }
      format.xml  { head :ok }
    end
  end
end

/views/posts/show.html.erb

<%= render :partial => @post %>

    <p>
        <%= link_to 'Edit',edit_post_path (@post) %> |
        <%= link_to 'Destroy',@post,:method => :delete,:confirm => "Are you sure?" %> |
        <%= link_to 'See All Posts',posts_path %>
    </p> 

    <h2>Comments</h2>
    <div id="comments">
        <%= render :partial => @post.comments %>
    </div>

    <% remote_form_for [@post,Comment.new] do |f| %>
        <p>
            <%= f.label :body,"New Comment" %><br/>
            <%= f.text_area :body %>
        </p>
        <p>

<%= f.submit "Add Comment" %></p>
<% end %>

/views/comments/_comment.html.erb

<% div_for comment do %>
    <p>
        <strong>Posted <%= time_ago_in_words(comment.created_at) %> ago
        </strong><br/>
        <%= h(comment.body) %><br/>
        <%= link_to 'Destroy',@comments,:confirm => "Are you sure?" %>
    </p>
<% end %>

的routes.rb

ActionController::Routing::Routes.draw do |map|
  map.resources :posts,:has_many => :comments
  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'
end