Hi Carlos!
Because of the nesting. For example, I recently hacked up a version of
Beast which is nested similarly to yours: Forums with many Topics with
many Posts. Creating a new post has the following resource path: /
forums/:forum_id/topics/:topic_id/posts/new
Even though the topic_id in my case is globally unique, it still needs
the forum_id for that path.
You don't have to do that, though. You could leave them as non-nested
and then just use associations, i.e. Topics has_many Items
I like nested resources conceptually but they do make url generation a
little confusing.
Just remember to use: "rake routes" liberally so that you always know
what routes are available and how to map them.
:-)
-Danimal
On Mar 31, 12:27 am, Carlos Santana <rails-mailing-l...@andreas-s.net>
wrote:
> Carlos Santana wrote:
> > I am using nested resources as follows:
> > map.resources :topics do |topics|
> > topics.resources :items do |items|
> > items.resources :attachments
> > end
> > end
>
> > When I generate a RESTful path for new item in the console:
> > app.new_topic_item_path(2) then I get correct path as
> > '/topics/2/items/new'.
>
> > However, for the new attachment I am getting error:
> > app.new_topic_item_attachment_path(22) gives -
> > ActionController::RoutingError: new_topic_item_attachment_url failed to
> > generate from {:action=>"new", :controller=>"attachments",
> > :topic_id=>22}, expected: {:controller=>"attachments", :action=>"new"},
> > diff: {:topic_id=>22}
>
> > from
> > /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/routing/route_set.rb:375:in
> > `raise_named_route_error'
> > from
> > /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/routing/route_set.rb:339:in
> > `generate'
> > from
> > /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/url_rewriter.rb:131:in
> > `rewrite_path'
> > from
> > /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/url_rewriter.rb:110:in
> > `rewrite_url'
> > from
> > /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/url_rewriter.rb:88:in
> > `rewrite'
> > from
> > /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/integration.rb:218:in
> > `url_for'
> > from (eval):17:in `new_topic_item_attachment_path'
> > from (irb):5.
>
> > - - - - -
>
> > Why is it failing and how to fix this?
> > And, why is it generating '{:action=>"new", :controller=>"attachments",
> > :topic_id=>22}' ? Shouldn't it pass item_id rather than topic_id?
>
> > Any clues?
>
> > -
> > Thanks,
> > CS.
>
> Figured it out:
> I did new_topic_item_attachment_path and got an error:
> ''ActionController::RoutingError: new_agenda_item_attachment_url failed
> to generate from {:action=>"new", :controller=>"attachments"} - you may
> have ambiguous routes, or you may need to supply additional parameters
> for this route. content_url has the following required parameters:
> ["agendas", :agenda_id, "items", :item_id, "attachments", "new"] - are
> they all satisfied?''
>
> So I need to pass both topic and item id. But isn't item associated with
> the topic resource? Why do I need to pass both ids?
>
> --
> Posted viahttp://www.ruby-forum.com/.
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