Question

The following link works in my app:

<%= link_to "invitation", :controller => :invitations, :action => :index %>

To follow restful conventions i changed the link to:

<%= link_to "invitation", index_invitation_path %>

The error that i get is:

undefined local variable or method `index_invitation_path'

Rake routes yields:

invitations GET    /invitations(.:format)          {:controller=>"invitations", :action=>"index"}

The page name is index.html.erb. The model is invitation.rb. The controller is invitation_controller.rb. Routes has resources :invitations. What am i missing?

Thanks!

Answer 1

Assuming you have the routing correct:

resources :invitations

Then the correct helper for the index action (with the url /invitations.html) is

invitations_path

You can see more information by running rake routes. It will display text like the following:

             lists GET    /lists(.:format)
           {:action=>"index", :controller=>"lists"}
                   POST   /lists(.:format)
           {:action=>"create", :controller=>"lists"}
          new_list GET    /lists/new(.:format)
           {:action=>"new", :controller=>"lists"}
         edit_list GET    /lists/:id/edit(.:format)
           {:action=>"edit", :controller=>"lists"}
              list GET    /lists/:id(.:format)
           {:action=>"show", :controller=>"lists"}
                   PUT    /lists/:id(.:format)
           {:action=>"update", :controller=>"lists"}
                   DELETE /lists/:id(.:format)
           {:action=>"destroy", :controller=>"lists"}
              root        /(.:format)
           {:controller=>"lists", :action=>"index"}

The above was from a route of my own (for a model called List). The route helper method is shown immediately before the HTTP method. You have to remember to append the _path to each helper method. For example the helper methods I could use are:

list_path(list)
edit_list_path(list)
new_list_path
lists_path