title: Symfony Doctrine ManyToOne association migration No reaction
body: <p>I have two tables one is entry.php and user.php</p>
  
  <p>I Want to associate $balance of user with the $balance of entry</p>
  
  <p>but when I try <strong>php bin/console doctrine:migrations:diff</strong></p>
  
  <p>I get </p>
  
  <blockquote>
    <p>No changes detected in your mapping information.</p>
  </blockquote>
  
  <p>this is my user.php</p>
  
  <pre><code>&lt;?php
  namespace BankBundle\Entity;
  use Doctrine\ORM\Mapping as ORM;
  use Symfony\Component\Validator\Constraints as Assert;
  /**
   * @ORM\Table(name="user")
   *
   * @ORM\Entity(repositoryClass="BankBundle\Entity\user")
   **/
  class user
  {
      /**
       * @ORM\Id
       * @ORM\Column(name="id",type="integer")
       * @ORM\GeneratedValue
       */
      private $id;
      /**
       * @ORM\OneToMany(targetEntity="entry", mappedBy="balance")
       * @var entry[] An ArrayCollection of entry objects.
       */
      private $balance;
  
      public function getId()
      {
          return $this-&gt;id;
      }
      public function getBalance()
      {
          return $this-&gt;balance;
      }
  }
  </code></pre>
  
  <p>and my entry.php</p>
  
  <pre><code>&lt;?php
  namespace BankBundle\Entity;
  use Doctrine\ORM\Mapping as ORM;
  use Symfony\Component\Validator\Constraints as Assert;
  /**
   * @ORM\Table(name="entry")
   *
   * @ORM\Entity(repositoryClass="BankBundle\Repository\BankRepository")
   **/
  class entry
  {
      /**
       * @ORM\Id
       * @ORM\Column(name="id",type="integer")
       * @ORM\GeneratedValue
       */
      private $id;
      /**
       * @ORM\Column(name="amount",type="integer")
       */
      private $amount;
      /**
       * @ORM\Column(name="balance",type="integer")
       * @ORM\ManyToOne(targetEntity="user", inversedBy="balance")
       */
      private $balance;
      /**
       * @ORM\Column(name="created_at",type="datetime")
       */
      private $created_at;
  }
  </code></pre>