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POCRUD operation for nested model in rails 3
 

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    <p>I am new in rails 3, and following the guide in ruby site I build the first blog application.</p> <p>However in the app,the model "Comment" do not have edit/update/delete operation.</p> <p>Then I tried to add it,but I fails.</p> <p>Instead of just generate model for model "Comment",I create the scaffold for model "Comment" using:</p> <pre><code>rails generate scaffold Comment commenter:string body:text post:references </code></pre> <p>And in the post.show page,I modify it like this:</p> <pre><code>&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_comment_path(comment) %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Destroy', comment, confirm: 'Are you sure?', method: :delete %&gt;&lt;/td&gt; &lt;/tr&gt; &lt;% end %&gt; </code></pre> <p>They are listed,but when I click the 'edit' or 'delete' link,it will try to jump to:</p> <pre><code>http://localhost:3000/comments/1 </code></pre> <p>And Then I will get the error:</p> <pre><code>No route matches [GET] "/comments/3/edit" or No route matches [DELETE] "/comments/3" </code></pre> <p>I have no idea now.</p> <p>Is there any demo out of box I can learn?</p> <hr> <p>UPdate:</p> <p>In the routes.rb:</p> <pre><code>resources :posts do resources :comments end </code></pre> <p>Note:the following is confided manually by myself. </p> <p>config generated by rails is :</p> <pre><code>resources :posts resources :comments </code></pre> <p>Why I modify it is that in the comment build form,the post url should be "/posts/1/comments" for create new Comment,otherwise the post url will be "/comments" which will not associate the post and the comment.</p>
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    1. COhow does your routes.rb look like?
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    2. CO@apneadiving:I update my post.
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    3. CO@hguser: see the update in my answer
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      1. USSamiron
 

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