使用Symfony中的Doctrine在数据库中创建一个具有关系的新表

Question

I'm struggling with this, in my project in symfony. I have a entity content, with doctrine i have a table in my db content, that saves contents. Every content has an id. If anyone wants to see a specific content they have to request it by submitting an email, I need to associate all the emails to the specific id content. I dont want to create a new entity just to save the request emails. Is there a way to create/associate a new table with doctrine annotations. They have to be in a relation many-to-one. Or is there another simple way to save the email requests. This is the code I have, but is not working.

    /**         
     * @ORM\Table(name="content")
     * @ORM\Entity(repositoryClass="myBundle\Repository\ContentRepository")
     */
    class Content{
        /**
         * @var integer
         * @ORM\Column(name="id", type="integer")
         * @ORM\Id
         * @ORM\GeneratedValue(strategy="AUTO")
         */
        private $id;

        /**
         * @var string $nome
         * @ORM\ManyToOne(targetEntity="Content")
         * @ORM\Column(name="email_request", type="string", length=255, unique=false, nullable=false )
         */
        private $emailRequest;

Thanks for your time.