Question

正如标题中所宣布的，我尝试根据无效学说的回应采取行动。但是，尽管转储确认返回了空值，但我的代码并未考虑到它。请问原因是什么？这是我的代码：

    public function getUserBATS(UserRepository $repository ,$email, ObjectManager $em): Collection
    {
        $user = $repository->findOneBy(array('email' => $email));
        dump($user);
        if($user != null) {
            $bats = $user->getBATS();
            return $bats;
        }
        else
        { return $message = 'email don't...';}
    }

Symfony response

Answer 1

您需要执行以下操作，导致您的函数返回Collection而不是字符串：

public function getUserBATS(UserRepository $repository ,$email, ObjectManager $em): Collection
{
    $user = $repository->findOneBy(array('email' => $email));
    if($user !== null) {
        return $user->getBATS();
    }
    throw new NotFoundHttpException('user not found');
}

我无法处理find函数的null返回

1 个答案: