title: Rspec: stub relationship find (chain)
body: <p>Controller:</p>
  
  <pre><code>@organization.topics.find(params[:id])
  </code></pre>
  
  <p>How can I stub this in my controller_spec with Rspec?  (<code>@organization</code> IS being set in my spec helper)</p>
  
  <p>I've tried:</p>
  
  <pre><code>controller.stub_chain(:topics, :find).with("37") { mock_topic }
  Topic.stub(:find).with("37") { mock_topic }
  </code></pre>
  
  <p>Neither of the above seem to work.  Any ideas?  Thanks!</p>