output

/2/admin/users/2/edit

i.e.

/user_id/admin/users/user_id/edit

This should error with a "No route matches" error because there's not enough parameters handed to the helper. It's not.

routes.rb

scope :path => ":account_id" do
  namespace :admin do
     resources :users
  end
end

view.html.erb

<%= puts edit_admin_user_path(@user) %>
<%= link_to "Edit", edit_admin_user_path(@user) %>

Your Turn.md

Now try this:

git clone git://github.com/rails3book/ticketee
cd ticketee
git checkout origin/account_scoping -b account_scoping
bundle install
bundle exec cucumber features/assigning_permissions.feature:32

You should get the same non-error that I am. This is the only way I can reproduce this issue.

I do get this error:

No route matches {:account_id=>#<User id: 1, name: "Paul", created_at: "2010-12-18 12:25:04", updated_at: "2010-12-18 12:25:04">, :controller=>"admin/users", :action=>"edit"}

The only substantial difference I can see is the parameter argument names:
edit_admin_user GET /:account_id/admin/users/:id/edit(.:format) {:action=>"edit", :controller=>"admin/users"}
admin_user_permissions GET /:account_id/admin/users/:user_id/permissions(.:format) {:action=>"index", :controller=>"admin/permissions"}

Could edit_admin_user be working simply because it's picking up the :id param and using it for both arguments. admin_user_permission is looking for :user_id and failing.

Only thing I can come up with.

I think pasco is on to something, yes.

grumble Trying to break on the call to the URL helper is segfaulting the 1.9.2 debugger for me. Will see if 1.8.7 works better.

Looks like ActionDispatch::Routing::RouteSet#handle_positional_args is deciding to assign :account_id from the User object. :id is also somehow assigned from the User object. I didn't investigate too much further here.

What's going on is that handle_positional_args is assigning the :account_id from the user object and the :id parameter is being filled from the request's path parameters. The permissions url fails to generate because :user_id is not in the path parameters for the show action. Using hash arguments generates both urls correctly as :account_id is filled from the path parameters. e.g:

<%= link_to "Delete", admin_user_path(:id => @user), :method => :delete, :confirm => "Are you sure you want to delete this user?" %>
<%= link_to "Permissions", admin_user_permissions_path(:user_id => @user) %>

Free books all round? Or do we have to share? lol