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POmake the comment(in the rails guide exmple) editable
 

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  1. POmake the comment(in the rails guide exmple) editable
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    <p>I am learning rails by following the rails 3 guide.</p> <p>The blog application have ran now,however I want to make the comment editable,and make the update ,create form both in the post show page. so I make the following modifiation:</p> <p>post.show.htm.erb:</p> <pre><code>&lt;h2&gt;Comments&lt;/h2&gt; &lt;% @post.comments.each do |comment| %&gt; &lt;tr&gt; &lt;td&gt;&lt;%= comment.commenter %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= comment.body %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Edit', edit_post_comment_path(@post,comment) %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Destroy', post_comment_path(@post,comment), confirm: 'Are you sure?', method: :delete %&gt;&lt;/td&gt; &lt;/tr&gt; &lt;% end %&gt; &lt;/table&gt; &lt;h2&gt;Add a comment:&lt;/h2&gt; #here,I can not set the form_for property. &lt;%= form_for([@post,@comment],:url=&gt;post_comment_path) do |f| %&gt; &lt;div class="field"&gt; &lt;%= f.label :commenter %&gt;&lt;br /&gt; &lt;%= f.text_field :commenter %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= f.label :body %&gt;&lt;br /&gt; &lt;%= f.text_area :body %&gt; &lt;/div&gt; &lt;div class="actions"&gt; &lt;%= f.submit %&gt; &lt;/div&gt; &lt;% end %&gt; </code></pre> <p>The controller controller:</p> <pre><code>class CommentsController &lt; ApplicationController # GET /posts/1/comments/1/edit def edit #render json: params @post=Post.find(params[:post_id]) @comments=Comment.all @comment = Comment.find(params[:id]) render "/posts/show" end #other action omitted def show # I donot know what to do here end end </code></pre> <p>However I can not access the link:</p> <pre><code>http://localhost:3000/posts/1 </code></pre> <p>I get the error:</p> <pre><code>No route matches {:action=&gt;"show", :controller=&gt;"comments"} </code></pre> <p>In fact,as you can see I have the show action in CommentController.</p> <p>And,I wonder why it will access the comments#show action?</p> <p>This is my routes:</p> <pre><code> post_comments GET /posts/:post_id/comments(.:format) comments#index POST /posts/:post_id/comments(.:format) comments#create new_post_comment GET /posts/:post_id/comments/new(.:format) comments#new edit_post_comment GET /posts/:post_id/comments/:id/edit(.:format) comments#edit post_comment GET /posts/:post_id/comments/:id(.:format) comments#show PUT /posts/:post_id/comments/:id(.:format) comments#update DELETE /posts/:post_id/comments/:id(.:format) comments#destroy posts GET /posts(.:format) posts#index POST /posts(.:format) posts#create new_post GET /posts/new(.:format) posts#new edit_post GET /posts/:id/edit(.:format) posts#edit post GET /posts/:id(.:format) posts#show PUT /posts/:id(.:format) posts#update DELETE /posts/:id(.:format) posts#destroy home_index GET /home/index(.:format) home#index root / home#index </code></pre> <p>The <code>/posts/:id</code> will trigger <code>posts#show</code>. why <code>comments#show</code>?</p>
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