Named routes in link_to wrapper

rubyonrails-talk
1

I am trying to create a custom link_to helper that passes sort parameters to a link. It has the following code, which is pretty much just a rewrite of link_to:

  def sort_link_to(sort, old_sort, old_dir, *args, &block)     if block_given?       options = (args.first || {}).merge({         :old_sort => old_sort,         :old_dir => old_dir,         :sort => sort       })       html_options = args[1]       link_to(capture(&block),options,html_options)     else       name = args.first       options = (args[1] || {}).merge({         :old_sort => old_sort,         :old_dir => old_dir,         :sort => sort       })

      html_options = args[2]

      link_to(name,options,html_options)     end   end

This works fine if I use it like so:

sort_link_to 'somesort','somename', :controller => 'somecontroller', :action => 'someaction'

My question is, how do I write this in such a way that I can use named routes, i.e., so that either of the following works?

This

sort_link_to 'somesort','somename', @someobjectwithmappedresources

or this

sort_link_to 'somesort','somename', somemappedresource_path

Currently, if I do either, it fails when it tries to merge the generated path from the named route with the options given to the helper (which makes sense). If there is some method that will take a hash and convert it to a query string that I may then concatenate to the resource path, then that would work, but I can not find such a method.

Also, and if very, very secondary importance, is there a way to access controller instance variables in a helper?

Thanks in advance for your time.

2

I just wanted to bump this once, because I'm still very interested in this, even though my workarounds are satisfactory.

3

This

sort_link_to 'somesort','somename', @someobjectwithmappedresources

or this

sort_link_to 'somesort','somename', somemappedresource_path

Currently, if I do either, it fails when it tries to merge the generated path from the named route with the options given to the helper (which makes sense). If there is some method that will take a hash and convert it to a query string that I may then concatenate to the resource path, then that would work, but I can not find such a method.

Well given a record you can call polymorphic_path on it (optionally supplying options to merge in). Hash has a to_query method on it that will generate a query string.

Also, and if very, very secondary importance, is there a way to access controller instance variables in a helper?

should just work.

Fred