title: How can I set a link to route with a dynamic segment
body: <p>How can I set a link to route with a dynamic segment. According to guide I start with this</p>
  
  <pre><code>window.App = Ember.Application.create()
  App.Router.map -&gt;
    @resource 'products'
    @resource 'product', path: '/product/:product_id'
  </code></pre>
  
  <p>in my template:</p>
  
  <pre><code>{{#linkTo "product.1"}}products{{/linkTo}}
  </code></pre>
  
  <p>Unfortunately this gives me the follwing error:  </p>
  
  <pre><code>Uncaught Error: assertion failed: The attempt to linkTo route 'product.1' failed. 
  The router did not find 'product.1' in its possible routes: 'products', 'product', 'index' 
  </code></pre>