具有Doctrine查询生成器的Symfony 3.0：[语法错误]行0，列7：错误：预期的已知函数，得到了“ WHERE”

Question

I have some issues using query builder. First things first I have this repository:

<?php
namespace AppBundle\Entity;

use AppBundle\Entity\Product;
use Doctrine\ORM\EntityRepository;

class UserRepository extends EntityRepository
{
  public function register($username,$password,$email)
  {
    //A Generic return Object
    $status=array('status'=>true,'data'=>"");

    if(empty($username))
    {
      $status['status']=-1;
      $status['data']='Username not given';
      return $status;
    }

    if(empty($password))
    {
      $status['status']=-1;
      $status['data']='Password not given';
      return $status;
    }

    if(empty($email))
    {
      $status['status']=-1;
      $status['data']='Email not given';
      return $status;
    }

    $token=md5(uniqid(gethostname(),true));

    try
    {


      $user=new Users();

      $user->setUsername($username)
            ->setPassword($password)
            ->setEmail($email)
            //->setActivated(false)
            ->setToken($token);

      $em=$this->getEntityManager();

      $tmp_user=$user->getUsername();
      $tmp_mail=$user->getEmail();
      $query=$em->createQueryBuilder('p')
                ->where('p.username=?',$tmp_user)
                ->orWhere('p.email=?',$tmp_mail)
                ->getQuery();

      $user=$query->getResult();
      var_dump($user);
      if(!empty($user))
      {
        $em->persist($user);

        $em->flush();
        $status['status']=true;
      }
      else
      {
        $result['data'] = -1;
        $result['status'] = "User exists";
      }

    }
    catch (\Exception $e)
    {
        echo $e->getMessage();
        $result['data'] = $e->getMessage(); // The exact message of the exception thrown during INSERT
        $status['status']=false;
    }


    return $status;
  }

}

What I want to achieve is to check if to check if there are any users with the same username or email. That's why I run:

  $tmp_user=$user->getUsername();
  $tmp_mail=$user->getEmail();
  $query=$em->createQueryBuilder('p')
            ->where('p.username=?',$tmp_user)
            ->orWhere('p.email=?',$tmp_mail)
            ->getQuery();

  $user=$query->getResult();

Inside the register function. But the:

    echo $e->getMessage();

Returns:

[Syntax Error] line 0, col 7: Error: Expected known function, got 'WHERE'

Answer 1

The select statement is missing, and your where statements must be prepared.

Change your code to :

$query = $em->createQueryBuilder('p')
    ->select('p')
    ->where('p.username = :username')
    ->orWhere('p.email = :email')
    ->setParameter('username', $tmp_user)
    ->setParameter('email', $tmp_mail)
    ->getQuery();

$user = $query->getResult();

Like this, you have a clean prepared query.

See the "Bind parameters to your query" chapter of doctrine QueryBuilder documentation

EDIT

You need to use the repository like follows :

$repository = $em->getRepository('YourBundle:YourEntity');
$query = $repository->createQueryBuilder('p)
    ->select('p')
    //...

Or add a FROM statement :

$query = $em->createQueryBuilder('p')
    ->from('YourEntityNamespace', 'p')
    // ...