The new router and slices provide a second url method called slice_url this is used like this inside your slice.

  slice_url(:MerbAuth, :login)

This protects your application by namespacing the routes. It would also be available via the url method with

  url(:merb_auth_login)

This is really good for code since now you can rest assured that a slice isn’t going to clobber your routes.

What about getting back the old global :login named route? Easy. When you add your slice to the router there are now some additional parameters you can use. The relevant ones here are :name_prefix and :path_prefix. Here’s an example of how you’d use them.

Merb::Router.prepare do  
  slice( :MerbAuth, :name_prefix => nil, :path_prefix => "auth", :default_routes => false )
end

By setting :name_prefix to nil, the routes defined in the slice will not be namespaced. They’ll still be accessible via slice_url inside the slice, but url(:login) will work as well.

The :path_prefix will setup a path prefix on the url for the router, so the above will match routes at ”/auth/login” for example.

:default_routes => false is one that should always be set IMHO. You want your apps default routes, not your slices right? Unless it’s got good reason anyway.

Just a handy quick update to help anyone caught with the new router changes.