Railscasts #71: Routing error when trying to pass parameters in post method

I am using RSpec-2 to test my controller and I am seeing weird behavior. Essentially I am doing the same as in Railscasts #71

describe DeliverablesController do
  describe "responding to POST create" do
    describe "with valid parameters" do
      it "should pass the params to the deliverable item" do
        post :create, :deliverable => {:title => "Some Deliverable"}
        assigns[:delive开发者_开发问答rable].title.should == "Some Deliverable"
      end
    end
  end
end

Which results in the following error:

  1) DeliverablesController responding to POST create with valid parameters should pass the params to the deliverable item
     Failure/Error: post :create, :deliverable => {:title => "Some Deliverable"}
     ActionController::RoutingError:
     No route matches {:deliverable=>{:title=>"Some Deliverable"}, :controller=>"deliverables", :action=>"create"}

Obviously :deliverable should not be part of the route but written into params. My problem starts with not being sure which post method is called.

My Gemfile.lock can be found here.

---

EDIT

And my routes.rb can be found here.

---

Sometimes it is good to bounce off ideas: My problem was that I am in a nested route basically doing the following.

resources :projects do
    resources :deliverables
end

The error message threw me off, the real problem was that I did not provide a project_id. I fixed it by doing

post :create, :project_id => 11, :deliverable => {:title => "Some Deliverable"}

instead of

post :create, :deliverable => {:title => "Some Deliverable"}

Thank you, hammar!