<?php


use Doctrine\Common\Collections\Collection;
use Doctrine\Common\Collections\ArrayCollection;



/**
 * @Entity
 */
class Book
{
    /**
     * @var integer
     * @Column(type="integer")
     */
    private $id;

    /**
     * @var string
     * @Column(type="string")
     */
    private $title;

    /**
     * @var string
     * @Column(type="string")
     */
    private $genre;

    /**
     * @var Collection
     * @ManyToMany(targetEntity="Option")
     * @JoinTable(name="books_options", joinColumns={@JoinColumn(name="option_id", referencedColumnName="id"), unique=TRUE}, inverseJoinColumns={@JoinColumn(name="book_id", referencedColumnName="id")})
     */
    private $options;



    public function __construct()
    {
        $this->options = new ArrayCollection();
    }



    /**
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }



    /**
     * @param integer $id
     * @return Book
     */
    public function setId($id)
    {
        $this->id = $id;
        return $this;
    }



    /**
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }



    /**
     * @param string $title
     * @return Book
     */
    public function setTitle($title)
    {
        $this->title = $title;
        return $this;
    }



    /**
     * @return string
     */
    public function getGenre()
    {
        return $this->genre;
    }



    /**
     * @param string $genre
     * @return Book
     */
    public function setGenre($genre)
    {
        $this->genre = $genre;
        return $this;
    }



    /**
     * @param Option $option
     * @return Book
     */
    public function addOption(Option $option)
    {
        $this->options->add($option);
        return $this;
    }



    /**
     * @param Option $option
     * @return Book
     */
    public function removeOption(Option $option)
    {
        $this->options->removeElement($option);
        return $this;
    }



    /**
     * @return array
     */
    public function getOptions()
    {
        return $this->options->toArray();
    }

}



<?php





/**
 * @Entity
 */
class Option
{
    /**
     * @var integer
     * @Column(type="integer")
     */
    private $id;

    /**
     * @var string
     * @Column(type="string")
     */
    private $description;



    /**
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }



    /**
     * @param integer $id
     * @return Option
     */
    public function setId($id)
    {
        $this->id = $id;
        return $this;
    }



    /**
     * @return string
     */
    public function getDescription()
    {
        return $this->description;
    }



    /**
     * @param string $description
     * @return Option
     */
    public function setDescription($description)
    {
        $this->description = $description;
        return $this;
    }

}