I am generating a URL for use with GoogleCheckout. I have a method in
a model that uses the visitors shopping cart to construct an xml
request to GoogleCheckout, in that request i need to include a
callback url that GoogleCheckout can use to contact my webapp.

On Aug 16, 11:07 am, Matt Jones <[email protected]> wrote:
> As in many cases, if it's difficult to do in Rails, it's probably
> wrong. Can you give more detail on why you're generating URLs in a
> model rather than in the controller/view that's sending them to the
> user?
>
> --Matt Jones
>
> On Aug 15, 9:22 am, "[email protected]" <[email protected]> wrote:
>
> > This only works for instance methods, my problem is that I need to be
> > able to access xxxx_path from a class method... meaning:
>
> > class Foo
> >  include ActionController::UrlWriter
> >  def self.generate
> >   login_path :host => 'example.com'
> >  end
> > end
> > ActionController::Routing::Routes.named_routes.install(Foo)
>
> > Foo.generate
> > #=> NameError: undefined local variable or method `login_path' for
> > Foo:Class
> >         from (irb):4:in `generate'
> >         from (irb):9
>
> > On Aug 15, 9:14 am, Frederick Cheung <[email protected]>
> > wrote:
>
> > > On Aug 15, 1:52 pm, "[email protected]" <[email protected]> wrote:
>
> > > > So i've been banging my head against this for the better part of the
> > > > last 5 hours and I have concluded that in my sleep deprived state I'm
> > > > missing something really obvious and should just ask for help.
>
> > > > I need to be able to access named route helpers (XXX_path and XXX_URL)
> > > > form a class method in an ActiveRecord model. I tried a couple of
> > > > approaches none of which worked:
>
> > > > 1) include ActionController::UrlWriter in the model class -- this
> > > > doesn't work because the included methods are instance methods and
> > > > thus are not available in the class methods
>
> > > > 2) According to the rails api you can access the helpers by using
> > > > ActionController::UrlWriter.xxx_path (http://api.rubyonrails.org/
> > > > classes/ActionController/UrlWriter.html). However that just doesn't
> > > > work for me, I get the following error
>
> > > > NoMethodError: undefined method `xxx_path' for
> > > > ActionController::UrlWriter:Module
>
> > > > If anyone has ANY ideas PLEASE let me know.
>
> > > The helpers are defined in an anonymous module hidden inside the
> > > routing stuff. You can ask rails to include that module in a class for
> > > you, eg
>
> > > class Foo
> > >  include ActionController::UrlWriter
> > >  def generate
> > >   parent_categories_url :host => 'example.com'
> > >  end
> > > end
> > > ActionController::Routing::Routes.named_routes.install(Foo)
>
> > > Foo.new.generate #=> "http://example.com/admin/parent_categories";
>
> > > Fred
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