通过scaffold生成的视图中的坏函数调用是什么?

我已经把东西搭好了:

script/generate scaffold wip/thing name:string

在视图中得到一些无效的函数调用,如:

<td><%= link_to 'Edit', edit_thing_path(thing) %></td>

引发此错误的原因:

ActionView::TemplateError (undefined method `edit_thing_path' for #<ActionView::Base:0xb5c00944>) on line #11 of app/views/wip/things/index.html.erb:                                                                                                                                 
8:   <tr>                                                                                                                                  
9:     <td><%=h thing.name %></td>
10:     <td><%= link_to 'Show', thing %></td>
11:     <td><%= link_to 'Edit', edit_thing_path(thing) %></td>
12:     <td><%= link_to 'Destroy', thing, :confirm => 'Are you sure?', :method => :delete %></td>
13:   </tr>
14: <% end %>

我在具有命名空间的路由中定义了资源:

  map.namespace :wip do |wip|
    wip.resources :things
  end

rake routes告诉我:

                                wip_things GET    /wip/things(.:format)                                                            {:action=>"index", :controller=>"wip/things"}
                                           POST   /wip/things(.:format)                                                            {:action=>"create", :controller=>"wip/things"}
                             new_wip_thing GET    /wip/things/new(.:format)                                                        {:action=>"new", :controller=>"wip/things"}
                            edit_wip_thing GET    /wip/things/:id/edit(.:format)                                                   {:action=>"edit", :controller=>"wip/things"}
                                 wip_thing GET    /wip/things/:id(.:format)  

我假设这些名称(wip\u thing,new\u wip\u thing)是正确的名称,但它仍然给我这个错误

谢谢。