我的多对多关系存在问题。我想访问查询生成器查询的引用表。由于多对多关系,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
上述结构有两个一对多的关系,并且可以正常使用数据库。当我的用户在数据库中具有以下数据时(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
巴特是一名军官,杰拉德是军医。但是当我想要检索数据时,它表示Bart是Medic,Gerard在该类别中具有“null”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UserCategory-entity:
/**
* 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UserUserCategory-entity:
/**
* 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-&gt; getEntityManager() - &gt; find('User \ Entity \ User','49') - &gt; 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中是军医印刷的,我希望军官能够回来。
在我的其他用户中,(id = 60)category_id字段为“null”。所以它看起来像Doctrine跳过我的UserUserCategory中的第一个输入,从第二个输入开始,不再能够获得最后一个类别。
答案 0 :(得分:1)
没有冒犯,但我觉得你的代码很难阅读。我建议你做一些修正,这甚至可以帮助你解决问题。
1:命名:代替UserCategory,将其重命名为Category。如果您的类别具有不同类型,请使用来自
等常量的值创建新列“type” class Category
{
const TYPE_USER = 1 ;
....
2:代替addCategories(Collection $ array),执行像
这样的单数版本public function addCategory(Category $category)
{
$reference = new UserCategory() ;
$reference->setUser($this) ;
$reference->setCategory($category) ;
$this->user_categories->add($reference) ;
}
public function removeCategory(Category $category)
{
foreach($this->user_categories as $reference) {
if ( $reference->getCategory() === $category )
$this->user_categories->removeElement($reference) ;
}
}
Symfony2自动识别这样的方法。即使您的关系是复数(如类别),s2也会找到奇异的addCategory和removeCategory方法。
要获取类别数组,请使用:
public function getCategories()
{
$categories = new ArrayCollection() ;
foreach($this->user_categories as $reference) {
$categories->add( $reference->getCategory() ) ;
}
return $categories ;
}
如果你这样做,你可能会解决你的问题。