rspec users - Jan 2012 - Nested resource view spec seems to be referring to a non-existent route

Hi all,

 In a view spec for a nested resource, do I need to instantiate/stub
the parent resource before I stub the nested resource?

 I am asking this because all my view specs are failing for a new
nested resource I have introduced in my application. The nested
resource works as expected
when I manually test it though :(

 Here''s how my edit view spec looks like.

----------- "./spec/views/sub_categories/edit.html.erb_spec.rb" -
start --------
require ''spec_helper''

describe "sub_categories/edit.html.erb" do
  before(:each) do

    @sub_category = assign(:sub_category, stub_model(SubCategory,
      :name => ''International interest rates'',
      :description => ''Comprehensive rates covering Australia, NZ,
Malaysia and Singapore'',
      :category_id => 3,
      :created_by => 1,
      :updated_by => 1
    ))
  end

  it "renders the edit sub category form" do
    render

    # Run the generator again with the --webrat flag if you want to
use webrat matchers
    assert_select "form", :action =>
category_sub_categories(@sub_category), :method => "post" do
      assert_select "input#sub_category_name", :name =>
"sub_category[name]"
      assert_select "textarea#sub_category_description", :name =>
"sub_category[description]"
    end
  end
end
----------- "./spec/views/sub_categories/edit.html.erb_spec.rb" - end
--------

Here''s an extract of the failure:
----------- extract start -------------------------

  1) sub_categories/edit.html.erb renders the edit sub category form
     Failure/Error: render
     ActionView::Template::Error:
       undefined method `sub_category_path'' for #<#<Class:
0x0000010127d2b8>:0x000001016e2380>
     # ./app/views/sub_categories/_form.html.erb:1:in
`_app_views_sub_categories__form_html_erb__4092631658606598204_2155519360''
     # ./app/views/sub_categories/edit.html.erb:3:in
`_app_views_sub_categories_edit_html_erb___3853358586184509671_2155544160''
     # ./spec/views/sub_categories/edit.html.erb_spec.rb:15:in `block
(2 levels) in <top (required)>''

----------- extract end -------------------------

 Here''s what my form partial looks like

----- app/views/sub_categories/_form.html.erb start
---------------------

<%= form_for [@category, @sub_category] do |f| %>
  <% if @sub_category.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@sub_category.errors.count, "error")
%>
prohibited this sub_category from being saved:</h2>

      <ul>
      <% @sub_category.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </div>
  <div class="field">
    <%= f.label :description %><br />
    <%= f.text_area :description %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

----- app/views/sub_categories/_form.html.erb end
---------------------


Here''s what I see when I run ''rake routes'':


------- routes start ---------------------------

   category_sub_categories GET    /categories/:category_id/
sub_categories(.:format)
{:action=>"index", :controller=>"sub_categories"}
                           POST   /categories/:category_id/
sub_categories(.:format)
{:action=>"create", :controller=>"sub_categories"}
 new_category_sub_category GET    /categories/:category_id/
sub_categories/new(.:format)
{:action=>"new", :controller=>"sub_categories"}
edit_category_sub_category GET    /categories/:category_id/
sub_categories/:id/edit(.:format)
{:action=>"edit", :controller=>"sub_categories"}
     category_sub_category GET    /categories/:category_id/
sub_categories/:id(.:format)
{:action=>"show", :controller=>"sub_categories"}
                           PUT    /categories/:category_id/
sub_categories/:id(.:format)
{:action=>"update", :controller=>"sub_categories"}
                           DELETE /categories/:category_id/
sub_categories/:id(.:format)
{:action=>"destroy", :controller=>"sub_categories"}
                categories GET    /
categories(.:format)
{:action=>"index", :controller=>"categories"}
                           POST   /
categories(.:format)
{:action=>"create", :controller=>"categories"}
              new_category GET    /categories/
new(.:format)
{:action=>"new", :controller=>"categories"}
             edit_category GET    /categories/:id/
edit(.:format)
{:action=>"edit", :controller=>"categories"}
                  category GET    /
categories/:id(.:format)
{:action=>"show", :controller=>"categories"}
                           PUT    /
categories/:id(.:format)
{:action=>"update", :controller=>"categories"}
                           DELETE /
categories/:id(.:format)
{:action=>"destroy", :controller=>"categories"}
                      root        /


------- routes end ---------------------------


 The form partial has been properly fitted with the parent resource
and the nested resource (ie. "form_for [@category, @sub_category]" ).

 It seems that it''s calling a route, sub_category_path which I have
never specified.
The error comes up when an edit/create form is to be created where a
form partial is called.

I am really puzzled on why this is happening and have consulted the
search results I had via google for ''nested resources with
rspec'' ,
''Rails in Action 3'' by Yehuda Katz, and the Rspec book :(

If anyone knows what I am missing, I would love to hear your thoughts.

 thank you :)

Gordon