Symfony2如何查找以指定字符开头的记录？

Question

如何查找以指定字符开头的记录？

例如：只有在用户名开始与A

User类

<?php 

    namespace DemoBundle\Entity; 

    use FOS\UserBundle\Model\User as BaseUser; 
    use Doctrine\ORM\Mapping as ORM; 

    /** 
    * @ORM\Entity 
    * @ORM\Table(name="fos_user") 
    */ 
    class User extends BaseUser 
    { 

     /** 
     * @ORM\Id 
     * @ORM\Column(type="integer") 
     * @ORM\GeneratedValue(strategy="AUTO") 
     */ 
     protected $id; 

     /** 
     * @ORM\Column(type="string", length=50) 
     */ 
     protected $name; 

     /** 
     * @ORM\Column(type="string", length=50) 
     */ 
     protected $lastname; 

     public function __construct() 
     { 
      parent::__construct(); 
      // your own logic 
     } 
    //getters and setters 
    } 

和控制器的行动解决方案@Kwido

public function listAction($letter) 
    { 
     $queryBuilder = $this->getEntityManager()->createQueryBuilder(); 
     $queryBuilder 
      ->select(['user']) 
      ->from(User::class, 'user') 
      ->andWhere($queryBuilder->expr()->like('user.lastname', ':lastname')) 
      ->setParameter('lastname', $queryBuilder->expr()->literal('A%')); 

     $result = $queryBuilder->getQuery()->getResult(); 

     die(var_dump($result)); 
} 

这个用户是所有我有什么。这给我的错误

试图调用名为 “getEntityManager” 类DemoBundle \控制器\ DefaultController”

Answer 1

嗨@Damian将您的代码更改为它。

public function listAction($letter) 
{ 
    $result = $this->getDoctrine() 
        ->getManager() 
        ->createQueryBuilder() 
        ->select('u') 
        ->from(User::class, 'u') 
        ->where('u.lastname LIKE :lastname') 
        ->setParameter('lastname', 'A%') 
        ->getQuery() 
        ->getResult(); 

    dump($result); 

    // return response bellow 
} 

当页面加载时，单击Symfony分析器栏并转到数据库部分。查看生成的查询并尝试直接在数据库上运行它。

Answer 2

使用一个未定义的方法的QueryBuilder的Like EXPR学说：

// Example - $qb->expr()->like('u.firstname', $qb->expr()->literal('Gui%')) 
public function like($x, $y); // Returns Expr\Comparison instance 

要在您的存储库中使用Like存储库类：

// getEntityManager() = $this->getDoctrine()->getManager(); 
$queryBuilder = $this->getEntityManager()->createQueryBuilder(); 
$queryBuilder 
    ->select(['user']) 
    ->from(User::class, 'user') 
    ->andWhere($queryBuilder->expr()->like('user.userName', ':userName')) 
    ->setParameter('userName', $queryBuilder->expr()->literal('A%')); 

$result = $queryBuilder->getQuery()->getResult();