resource_feeder and nested resources

rubyonrails-talk
1

hi, I've a problem with resource_feeder plugin, basically works fine until we give nested resource url.

Basically: /blog/1/posts/2, named route: blog_post_url

This needs :blog_id and :id passed as a parameter, otherwise it cannot work.

I've managed to go through some :link => lamda { |o| whatever.. } in :feed and :item options, but I've got no luck. Also I've tried to specify :url_rewriter option, but I come up with nothing.

any help would be appreciated, thanks.

[...]     @posts = BlogPost.find(:all, :order => 'created_at DESC', :limit => limit)     options_for_feed = {       :feed => { :title => "Latest #{limit} Blog Posts"},       :item => { :description => :excerpt }     }     respond_to do |format|       format.html       format.rss { render_rss_feed_for(@posts, options_for_feed) }       format.atom { render_atom_feed_for(@posts, options_for_feed) }     end

2

Hi Claudio,

This *may* work, it's untested, completely off the top of my head,
*and* it will only work to generate urls for records with existing
ids (which your blog_posts do have).

In the lib directory create a file called blog_post_url_writer.rb
with the following contents:

class BlogPostUrlWriter    def initialize(controller)      @controller = controller    end

   def blog_post_url(blog_post)      @controller.send :blog_post_url, blog_post.blog_id, blog_post    end end

Then, in your controller you do:

blog_post_url_writer = BlogPostUrlWriter.new(self)

and in your options_for_feed you add:

:url_writer => blog_post_url_writer

That *should* route the calls resource feeder makes to blog_post_url
through your special BlogPostUrlWriter instance, which as you can see
above, inserts the :blog_id into the call to the *real* blog_post_url
helper.

HTH, Trevor

3

hi Trevor, thanks so much for this code, well written and I will test it soon as
I can.

thanks again.

Claudio

4

[...]

allright, now I'm not in hurry and I can write a complete response :slight_smile:

your code works wonderfully, and I'll blog about it right now ( http://railswatcher.com ) giving you credit.

For people that doesn't want to bother reading the article here's the code for controller:

  def index     limit = 10     @posts = BlogPost.find(:all, :order => 'created_at DESC', :limit => limit)     blog_post_url_writer = BlogPostUrlWriter.new(self)     options_for_feed = {       :feed => { :title => "Latest #{limit} Blog Posts on iCoreTech.org", :link => "http://example.com" }, # remember to fill those fields, title, description and pub_date, I've encountered problems without.       :item => { :title => :title, :description => :excerpt, :pub_date => :created_at },       :url_writer => blog_post_url_writer     }     respond_to do |format|       format.html       format.rss { render_rss_feed_for(@posts, options_for_feed) }       format.atom { render_atom_feed_for(@posts, options_for_feed) }     end   end

Thanks!

Claudio