Php 原则2：选择实体字段，包括关联字段

我拥有以下实体：

/**
 * @ORM\Table(name="Employee")
 * 
@ORM\Entity(repositoryClass="Project\BackendBundle\Entity\Repository\EmployeeRepository")
 */
class Employee
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @ORM\ManyToOne(targetEntity="Division")
     * @ORM\JoinColumn(name="division_id", referencedColumnName="id")
     * @Expose
     **/
    private $division;

    /**
     * @ORM\ManyToOne(targetEntity="Position")
     * @ORM\JoinColumn(name="position_id", referencedColumnName="id")
     */
    private $position;

    .....
}

使用我的RESTAPI，我想制作一个名为“fields”的过滤器，我把它放在 要检索的实体字段的逗号分隔列表。我也 希望能够将相关字段放在那里。所以请求看起来 像这样：

/api/employee?fields=id,division

foreach ( $this->assoc as $key => $mapping ) {
    $queryBuilder
        ->addSelect(substr($key, 0, 1) . ' AS ' . $key)
        ->leftJoin(
            $mapping['targetEntity'],
            substr($key, 0, 1),
            \Doctrine\ORM\Query\Expr\Join::WITH,
            substr($key, 0, 1) . ' = u.' . $key
        );
}

array (size=2)
  0 => 
    array (size=1)
      'division' => 
        object(Project\BackendBundle\Entity\Kategorija)[672]
          private 'id' => int 20
          private 'name' => string 'division1' (length=9)
  1 => 
    array (size=2)
      'position' => 
        object(Project\BackendBundle\Entity\Position)[629]
          private 'id' => int 15
          private 'name' => string 'Manager' (length=7)
      'id' => int 890

SELECT partial u.{id,division} FROM Project\BackendBundle\Entity\Employee u

我检查这些字段，如果它们存在于实体字段或关联映射中

每个关联字段都会添加到查询中，如下所示：

/api/employee?fields=id,division

foreach ( $this->assoc as $key => $mapping ) {
    $queryBuilder
        ->addSelect(substr($key, 0, 1) . ' AS ' . $key)
        ->leftJoin(
            $mapping['targetEntity'],
            substr($key, 0, 1),
            \Doctrine\ORM\Query\Expr\Join::WITH,
            substr($key, 0, 1) . ' = u.' . $key
        );
}

array (size=2)
  0 => 
    array (size=1)
      'division' => 
        object(Project\BackendBundle\Entity\Kategorija)[672]
          private 'id' => int 20
          private 'name' => string 'division1' (length=9)
  1 => 
    array (size=2)
      'position' => 
        object(Project\BackendBundle\Entity\Position)[629]
          private 'id' => int 15
          private 'name' => string 'Manager' (length=7)
      'id' => int 890

SELECT partial u.{id,division} FROM Project\BackendBundle\Entity\Employee u

根据上述请求，我得到以下DQL：

SELECT u.id, d AS division FROM Project\BackendBundle\Entity\Employee u LEFT JOIN Project\BackendBundle\Entity\Division d WITH d = u.division

SELECT u.id, d AS division, p AS position FROM Project\BackendBundle\Entity\Employee u LEFT JOIN Project\BackendBundle\Entity\Division d WITH d = u.division LEFT JOIN Project\BackendBundle\Entity\Position p WITH p= u.position

一切正常，我得到了预期的结果（

var\u dump（）

）：

现在，如果我在请求的字段中再添加一个相关字段：

/api/employee?fields=id,division,position

我得到以下DQL：

SELECT u.id, d AS division FROM Project\BackendBundle\Entity\Employee u LEFT JOIN Project\BackendBundle\Entity\Division d WITH d = u.division

SELECT u.id, d AS division, p AS position FROM Project\BackendBundle\Entity\Employee u LEFT JOIN Project\BackendBundle\Entity\Division d WITH d = u.division LEFT JOIN Project\BackendBundle\Entity\Position p WITH p= u.position

现在的结果如下所示：

/api/employee?fields=id,division

foreach ( $this->assoc as $key => $mapping ) {
    $queryBuilder
        ->addSelect(substr($key, 0, 1) . ' AS ' . $key)
        ->leftJoin(
            $mapping['targetEntity'],
            substr($key, 0, 1),
            \Doctrine\ORM\Query\Expr\Join::WITH,
            substr($key, 0, 1) . ' = u.' . $key
        );
}

array (size=2)
  0 => 
    array (size=1)
      'division' => 
        object(Project\BackendBundle\Entity\Kategorija)[672]
          private 'id' => int 20
          private 'name' => string 'division1' (length=9)
  1 => 
    array (size=2)
      'position' => 
        object(Project\BackendBundle\Entity\Position)[629]
          private 'id' => int 15
          private 'name' => string 'Manager' (length=7)
      'id' => int 890

SELECT partial u.{id,division} FROM Project\BackendBundle\Entity\Employee u

问题是，现在一个实体的结果位于两个数组中 一个

预期结果是：

array (size=1)
  0 => 
    array (size=3)
      'division' => 
        object(Project\BackendBundle\Entity\Kategorija)[672]
          private 'id' => int 20
          private 'name' => string 'division1' (length=9)
      'position' => 
        object(Project\BackendBundle\Entity\Position)[629]
          private 'id' => int 15
          private 'name' => string 'Manager' (length=7)
      'id' => int 890

我错过了什么或做错了什么

编辑

我发现我把字段弄错了。我开始使用部分功能

根据请求，DQL如下所示：

/api/employee?fields=id,division

foreach ( $this->assoc as $key => $mapping ) {
    $queryBuilder
        ->addSelect(substr($key, 0, 1) . ' AS ' . $key)
        ->leftJoin(
            $mapping['targetEntity'],
            substr($key, 0, 1),
            \Doctrine\ORM\Query\Expr\Join::WITH,
            substr($key, 0, 1) . ' = u.' . $key
        );
}

array (size=2)
  0 => 
    array (size=1)
      'division' => 
        object(Project\BackendBundle\Entity\Kategorija)[672]
          private 'id' => int 20
          private 'name' => string 'division1' (length=9)
  1 => 
    array (size=2)
      'position' => 
        object(Project\BackendBundle\Entity\Position)[629]
          private 'id' => int 15
          private 'name' => string 'Manager' (length=7)
      'id' => int 890

SELECT partial u.{id,division} FROM Project\BackendBundle\Entity\Employee u

结果是：

array (size=1)
      0 => 
        array (size=3)
          'division' => 
            object(Project\BackendBundle\Entity\Kategorija)[672]
              private 'id' => int 20
              private 'name' => string 'division1' (length=9)
          'position' => 
            object(Project\BackendBundle\Entity\Position)[629]
              private 'id' => int 15
              private 'name' => string 'Manager' (length=7)
          'id' => int 890

您可以看到，我得到了请求的实体字段+所有关联字段，无论我只请求了一个关联字段

---

如何过滤这些相关字段？

您使用什么命令来执行DQL？当您在DQL语句中选择“division”或“position”时，它会将其视为完整对象。如果您选择division.id和position.id，应该可以正常工作。

或者您可以选择所需的员工（无需复杂查询），获取请求的字段名数组，并将其作为序列化组传递给JMS序列化程序（您很可能正在使用它）。此外，您的实体在属性上定义这些组的方式是，position将具有组“position”，id将具有组“id”，依此类推。这样，序列化程序将只从您作为组传递的实体中获取这些属性