在doctrine2，Symfony2中有条件异常查询

Question

I have a problem in symfony2 and doctrine2. When I add a Criteria exception, it doesn't appear like I want. This is the code:

Model

/**
 * @ORM\ManyToMany(targetEntity="users",inversedBy="friends",cascade={"ALL"})
 * @ORM\JoinTable(name="friends",
 *      joinColumns={@ORM\JoinColumn(name="friend_id", referencedColumnName="id")},
 *      inverseJoinColumns={@ORM\JoinColumn(name="user_id", referencedColumnName="id")},
 *      )
 */
private $friendsof;

public function getusersre() {

    $criteria = new Criteria();
    $criteria->Where($criteria->expr()->eq('accepted', '1'));
    return $this->friendsof->matching($criteria);

}

Output

SELECT te.id AS id, te.email AS email, te.username AS username
FROM users te JOIN friends t ON t.user_id = te.id
WHERE t.friend_id = ? AND te.accepted = ?

I want that it appear like this:

WHERE t.friend_id = ? AND t.accepted = ?

Answer 1

Doctrine generates intermediate table for Many to Many relationship. And you can't add any field to that table. I mean field accepted . Also you have three tables:

• Users.
• Intermediate table for many to many relationship.
• Friends.

In your getusersre function you want to try get friends. As I understood it is impossible to add accepted field for your criteria as you wanted.

Also I have changed your structure. What do you think about it?

class User
{

   /**
    * @var integer
    *
    * @ORM\Column(name="id", type="integer")
    * @ORM\Id
    * @ORM\GeneratedValue(strategy="AUTO")
    */
   private $id;

   /**
    * @var string
    *
    * @ORM\Column(name="username", type="string", length=255, unique=true)
    */
   private $username;


   /**
    * @ORM\OneToMany(targetEntity="Friend", mappedBy="userId")
    */
   private $friends;

   //Other fields, getters and setters.
}

class Friend
{
   /**
    * @var integer
    *
    * @ORM\Column(name="id", type="integer")
    * @ORM\Id
    * @ORM\GeneratedValue(strategy="AUTO")
    */
   private $id;

   /**
    * @ORM\ManyToOne(targetEntity="User", inversedBy="friends")
    * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
    */
   protected $userId;

   /**
    * @ORM\ManyToOne(targetEntity="User", inversedBy="friends")
    * @ORM\JoinColumn(name="friend_id", referencedColumnName="id")
    */
   protected $friendId;

   /**
    * @ORM\Column(name="accepted", type="boolean")
    */
   protected $accepted;

   //Other fields, getters and setters
}

The name of Friend entity is not solid. You can use FriendRelationship .

Also,function getAcceptedFriends will like that.

public function getAcceptedFriends()
{
    $cr = Criteria::create();
    $cr->andWhere($cr->expr()->eq('accepted', 1));

    return $this->friends->matching($cr);
}

Or

public function getAcceptedFriends()
{
    $friends = [];
    /** @var Friend $friend */
    foreach ($this->friends as $friend) {
        if ($friend->getAccepted()) $friends[] = $friend;
    }

    return $friends;
}

You can use like that.

foreach($user->getAcceptedFriends() in $friendRelationship){

   // $friendRelationship is a instance of Friend.
   $username = $friendRelationship->getFriendId()->getUsername();
}

In twig

{% for fr in user.acceptedFriends %}
    {{ fr.friendId.username }}
{% else %}
    {{ 'No friend' }}
{% endfor %}