title: Symfony3 The identifier id is missing for a query of AppBundle\Entity\
body: <p>I am new to symfony and I am trying to pass a object from a list to a new page using: </p>
  
  <p><code>&lt;a href="{{ path('fooUpdate', { 'id': item.id }) }}"&gt;Update&lt;/a&gt;</code></p>
  
  <p>The list <code>({% for item in list %})</code> of Foo objects is fine, the objects are fully loaded from the database, but the link does not work because of this Doctrine error:</p>
  
  <p><code>The identifier id is missing for a query of AppBundle\Entity\Foo</code></p>
  
  <p>Here is the Foo class:</p>
  
  <pre><code>namespace AppBundle\Entity;
  
  use Doctrine\ORM\Mapping as ORM;
  
  /** 
   * @ORM\Entity
   * @ORM\Table(name="foo") 
   */
  class Foo {
  
  /** 
   * @ORM\Id 
   * @ORM\Column(type="integer") 
   * @ORM\GeneratedValue
   */
  private $id;
  
  /** 
   * @ORM\Column(type="string")    
   */
  private $description;
  
  //getters and setters
  </code></pre>
  
  <p>And here is the controller method:</p>
  
  <pre><code>/**
   * @Route("/foo/fooUpdate/", name="fooUpdate")
   */
  public function updateAction($id, Request $request) {
      $foo = $this-&gt;getDoctrine()-&gt;getRepository('AppBundle:Foo')-&gt;find($id);
      return $this-&gt;render('/foo/fooUpdate.html.twig', array(
              'foo' =&gt; $foo
      ));
  }
  </code></pre>
  
  <p>The link itself looks like it is working, because the URL of the error is:</p>
  
  <pre><code>http://127.0.0.1:8000/foo/fooUpdate/?id=1
  </code></pre>
  
  <p>So what am I missing?</p>
  
  <p>Also, is there any way of doing this using POST, so the id will not appear in the URL?</p>