Rails - Nov 2010 - having trouble accessing a nested resource in rails 2.3.5

I am trying to add comments to my blog.

comments_controller.rb:
  def create
    @blog = Blog.find(params[:blog_id])
    @comment = @blog.comments.create(params[:comment])
    redirect_to blog_path(@blog)
  end


In my blog''s index view:
  <% form_for([ @blog, @comment ]) do |f| %>
    ...
  <% end %>


blog.rb:
  has_many :comments


comment.rb:
  belongs_to :blog


routes.rb:
  map.resources :blogs, :has_many => :comments


The error I get is:
  undefined method ''nil_class_path''
and it points to the form_for line

I can add comments from the console, but if I attempt to view them by
adding "@comments = Blog.comments.all" to my
blog_controller''s index
action, then "<% @comments.each do |comment| %> " into the
corresponding view, I get an "undefined method
''comments''" error

Any assistance would be awesome.  And I am only using rails 2 because
my host does not support rails 3. I do not have any trouble getting
the above to work in rails 3, but i don''t know what I am doing wrong
now.

Thanks.

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I managed to make it work well enough.

I put the following into the blog controller:
        def show
		@blog = Blog.find(params[:id])

		respond_to do |format|
			format.html # show.html.erb
			format.xml { render :xml => @blog }
		end
	end

then used ajax to load the commends from the show URL into the
index...probably not the sanest way to do it, but i kept getting
errors otherwise.

On Nov 7, 12:56 pm, aperture science
<mekkagoj...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I am trying to add comments to my blog.
>
> comments_controller.rb:
>   def create
>     @blog = Blog.find(params[:blog_id])
>     @comment = @blog.comments.create(params[:comment])
>     redirect_to blog_path(@blog)
>   end
>
> In my blog''s index view:
>   <% form_for([ @blog, @comment ]) do |f| %>
>     ...
>   <% end %>
>
> blog.rb:
>   has_many :comments
>
> comment.rb:
>   belongs_to :blog
>
> routes.rb:
>   map.resources :blogs, :has_many => :comments
>
> The error I get is:
>   undefined method ''nil_class_path''
> and it points to the form_for line
>
> I can add comments from the console, but if I attempt to view them by
> adding "@comments = Blog.comments.all" to my
blog_controller''s index
> action, then "<% @comments.each do |comment| %> " into the
> corresponding view, I get an "undefined method
''comments''" error
>
> Any assistance would be awesome.  And I am only using rails 2 because
> my host does not support rails 3. I do not have any trouble getting
> the above to work in rails 3, but i don''t know what I am doing
wrong
> now.
>
> Thanks.
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I believe your problem is this:

Blog.comments.all

You want comments on a specific blog, so you need this instead:

@blog = Blog.find(params[:id])
@comments = @blog.comments

Hope this helps.

Jeff

purpleworkshops.com

On Nov 7, 2:56 pm, aperture science
<mekkagoj...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I am trying to add comments to my blog.
>
> comments_controller.rb:
>   def create
>     @blog = Blog.find(params[:blog_id])
>     @comment = @blog.comments.create(params[:comment])
>     redirect_to blog_path(@blog)
>   end
>
> In my blog''s index view:
>   <% form_for([ @blog, @comment ]) do |f| %>
>     ...
>   <% end %>
>
> blog.rb:
>   has_many :comments
>
> comment.rb:
>   belongs_to :blog
>
> routes.rb:
>   map.resources :blogs, :has_many => :comments
>
> The error I get is:
>   undefined method ''nil_class_path''
> and it points to the form_for line
>
> I can add comments from the console, but if I attempt to view them by
> adding "@comments = Blog.comments.all" to my
blog_controller''s index
> action, then "<% @comments.each do |comment| %> " into the
> corresponding view, I get an "undefined method
''comments''" error
>
> Any assistance would be awesome.  And I am only using rails 2 because
> my host does not support rails 3. I do not have any trouble getting
> the above to work in rails 3, but i don''t know what I am doing
wrong
> now.
>
> Thanks.
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