title: Pass constant in CakePHP 3 routing
body: <p>In my CakePHP 3 application I have a route configured as below</p>
  
  <pre><code>$routes-&gt;connect(
          '/search-cars-for-dealers/:id',
          [
              'controller' =&gt; 'Cars',
              'action' =&gt; 'view',
          ],
          [
              'pass' =&gt; ['id', 'searchCarsForDealers']
          ]
      );
  </code></pre>
  
  <p>As you can see, I am trying to pass two parameters to the controller action. The first being <code>id</code> which is obtained from the original request URL and the second is a constant string - searchCarsForDealers</p>
  
  <p>However, Cake doesnt pass the constant string. It only passes id and passes NULL for the second parameter. So my question is - how can I pass constant strings based on the routing URL?</p>