CODEWITHSUNDEEP
symfonydoctrine-ormentity-relationshipone-to-many
Andrea
Andrea

Reputation: 3717

Doctrine2 - How to limit @OneToMany mapping size?

I was wondering if there exists any way to set a constraint on the size of a @OneToMany relation in Doctrine2.

Let's say I have 2 classes: User and Toy:

class User{
    ...
    /**
     * @OneToMany(targetEntity="Toy", mappedBy="user")
     */
    public $toys;
    ...
}
class Toy{
    ...
    /**
     * @ManyToOne(targetEntity="User", inversedBy="toys")
     */
    public $user;
    ...
}

I would like to force each user to have at most 3 toys. Do you know if there is a way to achieve this by using any Doctrine2 annotation?

If it is not possible through annotations, how would you do this?

Thanks!

Upvotes: 0

Views: 1845

Answers (1)

PatrikAkerstrand
PatrikAkerstrand

Reputation: 45721

class User {
 [..]
 public function addToy (Toy $toy)
 {
   if(count($this->toys) >= 3 && !$this->toys->contains($toy)) {
     throw new User\ToyLimitExceededException(
       'At most 3 toys are allowed per user, tried to add another!'
     );
   }
   $this->toys->add($toy);
   $toy->setUser($this);
   return $this;
 }
 [..]
}

Upvotes: 6

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