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    <p><strong>Assumptions ...</strong></p> <p>No, you don't need to declare them anywhere else than in your Entity directory. </p> <ul> <li><p>What's the error message you got?</p></li> <li><p>I guess you added </p> <p>use Doctrine\ORM\Mapping as ORM;</p></li> </ul> <p>on the top of your classes to let them be mapped.</p> <p><strong>I tried ...</strong></p> <p>I tried to generate your entities by adding a simple Contact &amp; Conference entities and it's working fine. Here are the code snippets:</p> <p><strong>Contact_Conference_Invitation.php</strong></p> <pre><code>namespace Ahsio\StackBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity */ class Contact_Conference_Invitation { /** * @ORM\Id * @ORM\ManyToOne(targetEntity="Ahsio\StackBundle\Entity\Contact") */ private $contact; /** * @ORM\Id * @ORM\ManyToOne(targetEntity="Ahsio\StackBundle\Entity\Conference") */ private $conference; /** * @var datetime dateInvitation * * @ORM\Column(name="dateInvitation", type="datetime") */ private $dateInvitation; //Getters and setters } </code></pre> <p><strong>Contact.php</strong></p> <pre><code>namespace Ahsio\StackBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity */ class Contact { /** * @ORM\Id * @ORM\Column(type="integer") * @ORM\GeneratedValue(strategy="AUTO") */ protected $id; /** * @param $id */ public function setId($id) { $this-&gt;id = $id; } /** * Get id * * @return integer */ public function getId() { return $this-&gt;id; } } </code></pre> <p><strong>Conference.php</strong></p> <pre><code>namespace Ahsio\StackBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity */ class Conference { /** * @ORM\Id * @ORM\Column(type="integer") * @ORM\GeneratedValue(strategy="AUTO") */ protected $id; /** * @param $id */ public function setId($id) { $this-&gt;id = $id; } /** * Get id * * @return integer */ public function getId() { return $this-&gt;id; } } </code></pre> <p>Here are the generated tables:</p> <p><img src="https://i.stack.imgur.com/cRAK5.jpg" alt="enter image description here"></p> <p>NB: I used a specific namespace for the entities generation to work fine, you need to change them.</p>
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