Trouble with deleting my blog posts using the UI-Collection of common programming errors

I am very new to Ruby on Rails so apologies, as this may be a silly question to post here.

I have made a blog (using generate scaffold). I have a few pages to interact and edit blog posts, starting with a main page which displays all blog posts (“index”), an area to view a specific blog post (“show”), and area to edit a blog post (“edit”), and an area to create a new blog post (“new”). I’ve also created comments (again using generate scaffold) to be applied to relevant blog posts. Comments, and a partial form for comments appears on the “show” page.

I have been working away on the whole thing to get it working nicely, but have recently realised that delete buttons that I had on the “index” page aren’t working. Instead of prompting confirmation for the delete, I’m simply taken to the “show” of the relevant post.

Here is a snippet of the index “index” page:

” %> ago () “submit-button” %> “submit-button” %> :delete, :class => “submit-button” %>

And here is the snippet of code from the posts_controller relevant to the delete:

def destroy
@post = Post.find(params[:id])

respond_to do |format|
  format.html { redirect_to posts_url }
  format.json { head :ok }

I have also found that the remove comment buttons (on the “show” page alongside each comment) have stopped working with an error message:

Unknown action

The action ‘show’ could not be found for CommentsController

For reference the code for the “remove comment” button is:

 'Are you sure?',
    :method => :delete %>

And the snippet of code in the comments_controller is:

def destroy
@post = Post.find(params[:post_id])
@comment = @post.comments.find(params[:id])
redirect_to post_path(@post)

I lack the full knowledge of how RoR works, and how these files interact with each other fully to troubleshoot the problem, so any help would be very much appreciated.

  1. I’ve found the problem – I had customised the links to stylesheets, javascript files etc and in doing this I had left out links to the javascript files for posts and comments created by the scaffold.

    After including links to these files everything worked again.

  2. First you miss the arrow in the destroy link method call Correct it to this.

     :delete, :class => "submit-button" %>

    Second you don’t have to find the post of a comment to delete it simply do this.

    If you want to be redirected back to the post, you do it in the controller

     :delete %>

    in the comment_controller

    def destroy
        @comment = Comment.find(params[:id])
        @post =
        respond_to do |format|
          format.html { redirect_to @post }
          format.json { head :ok }

Originally posted 2013-11-10 00:12:37.