我的多对多关系有问题。我想访问查询构建器查询的参考表。对于多对多关系,我无法访问我的参考表,因此我设置了两个一对多关系。我的结构看起来像:
User ---> UserUserCategory <--- UserCategory
上面的结构有两个一对多的关系,并且与数据库一起工作得很好。当我在数据库中有一个具有以下数据的用户时(在 UserUserCategory 中):
Table User
ID | Name
1 | Bart
2 | Gerard
Table Category
ID | Name
1 | Officer
2 | Medic
Table UserUserCategory
User | Category
1 | 1
2 | 2
所以巴特是一名军官,杰拉德是一名医生。但是当我要检索数据时,它说 Bart 是 Medic,而 Gerard 在类别中有一个“空”值。
我的用户实体:
/**
* Entity Class representing a post of our User module.
*
* @ORM\Entity
* @ORM\Table(name="user")
* @ORM\Entity(repositoryClass="User\Repository\UserRepository")
*
*/
class User extends zfcUser implements UserInterface
{
/**
* Categories from user
*
* @ORM\OneToMany(targetEntity="User\Entity\UserUserCategory", mappedBy="user_id", cascade={"remove", "persist"})
* @var UserUserCategory
* @access protected
*/
protected $user_usercategories;
//name & user_id comes here
/**
* Constructor to make a new ArrayCollection for addresses
*
*
*/
public function __construct()
{
$this->user_usercategories = new ArrayCollection();
}
/**
* @param Collection $categories
*/
public function addUserUserCategories(Collection $user_usercategories)
{
foreach ($user_usercategories as $user_usercategorie) {
$user_usercategorie->setUser($this);
$this->user_usercategories->add($user_usercategorie);
}
}
/**
* @param Collection $categories
*/
public function removeUserUserCategories(Collection $user_usercategories)
{
foreach ($user_usercategories as $user_usercategorie) {
$user_usercategorie->setUser(null);
$this->user_usercategories->removeElement($user_usercategorie);
}
}
/**
* @return Collection
*/
public function getUserUserCategories()
{
return $this->categories;
}
}
我的用户类别实体:
/**
* A User category entity.
* @ORM\Entity
* @ORM\Table(uniqueConstraints={@ORM\UniqueConstraint(name="unique_name_parentId", columns={"name", "parent_id"})})
* @ORM\HasLifecycleCallbacks
*/
class UserCategory extends Category
{
/**
* User_usercategories
*
* @ORM\OneToMany(targetEntity="User\Entity\UserUserCategory", mappedBy="category_id")
* @var UserUserCategory
* @access protected
*/
protected $user_usercategories;
/**
* Constructor
*/
public function __construct()
{
$this->user_usercategories = new ArrayCollection();
}
/**
* @param Collection $categories
*/
public function addUserUserCategories(Collection $user_usercategories)
{
foreach ($user_usercategories as $user_usercategorie) {
$user_usercategorie->setCategory($this);
$this->user_usercategories->add($user_usercategorie);
}
}
/**
* @param Collection $categories
*/
public function removeUserUserCategories(Collection $user_usercategories)
{
foreach ($user_usercategories as $user_usercategorie) {
$user_usercategorie->setCategory(null);
$this->user_usercategories->removeElement($user_usercategorie);
}
}
/**
* @return Collection
*/
public function getUserUserCategories()
{
return $this->categories;
}
}
我的用户用户类别实体:
/**
* Entity Class representing a post of our User_UserCategory entity.
*
* @ORM\Entity
* @ORM\Table(name="user_usercategory")
*
*/
class UserUserCategory
{
/**
* User with a category
*
* @ORM\ManyToOne(targetEntity="User\Entity\User", inversedBy="user_usercategories")
* @ORM\JoinColumn(name="user_id", referencedColumnName="user_id", nullable=false, onDelete="CASCADE")
* @ORM\Id
*
* @var User
* @access protected
*/
protected $user_id;
/**
* Category from user
*
* @ORM\ManyToOne(targetEntity="User\Entity\UserCategory", inversedBy="user_usercategories")
* @ORM\JoinColumn(name="category_id", referencedColumnName="id", nullable=false, onDelete="CASCADE")
* @ORM\Id
*
* @var Category
* @access protected
*/
protected $category_id;
public function getUser()
{
return $this->user;
}
/**
* Set User
*
* @param User $user
* @return User
*/
public function setUser(User $user = null)
{
//die('setUser');
$this->user = $user;
return $this;
}
public function getCategory()
{
return $this->category;
}
/**
* Set Category
*
* @param Category $category
* @return Category
*/
public function setCategory(Category $category = null)
{
$this->category = $category;
return $this;
}
}
当我执行以下行时,它会返回错误的结果。弹出错误的类别:
\Doctrine\Common\Util\Debug::dump($this->getEntityManager()->find('User\Entity\User', '49')->user_usercategories); 死;
结果:
array(1) {
[0]=>
object(stdClass)#452 (3) {
["__CLASS__"]=>
string(28) "User\Entity\UserUserCategory"
["user_id"]=>
string(16) "User\Entity\User"
["category_id"]=>
string(24) "User\Entity\UserCategory"
}
}
在 category_id 中打印的是军医,我希望军官能回来。
在我的另一个用户中,(id=60) category_id 字段为“null”。所以看起来 Doctrine 跳过了我的 UserUserCategory 中的第一个输入,从第二个开始并且不能再获得最后一个类别。