我的多對多關係存在問題。我想要訪問查詢構建器查詢的參考表。有了多對多的關係,我無法訪問我的參考表,所以我建立了兩個一對多的關係。我的結構上看喜歡:與參考表(Doctrine 2,ZF2)的兩個一對多關係
User ---> UserUserCategory <--- UserCategory
上述結構有兩個一個一對多的關係,並與數據庫工作的罰款。當我有與數據庫(在UserUserCategory)以下數據的用戶:
Table User
ID | Name
1 | Bart
2 | Gerard
Table Category
ID | Name
1 | Officer
2 | Medic
Table UserUserCategory
User | Category
1 | 1
2 | 2
所以巴特是官和傑拉德是一名醫生。但是當我想要檢索數據時,它說Bart是Medic,Gerard在這個類別中有一個「空值」。
我的用戶實體:
/**
* 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UserCategory實體:
/**
* 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UserUserCategory實體:
/**
* 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 $this;
}
}
當我執行以下行時,它會返回錯誤的結果。彈出錯誤的類別:
\ Doctrine \ Common \ Util \ Debug :: dump($ this-> getEntityManager() - > find('User \ Entity \ User','49') - > user_usercategories); 死亡;
結果:
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是軍醫印刷,我希望官員要回。
在我的其他用戶(id = 60)中,category_id字段爲「null」。所以它看起來很喜歡Doctrine跳過我UserUserCategory中的第一個輸入,從第二個開始,不能再獲得最後一個類。
我的問題現在已修復。我在參考表中使用了一個ID。所以我沒有兩個標識符了。而且我沒有使用Symfony,而是使用Zend框架2(標題)。 UserCategory實體從Category實體擴展,因爲會有更多的類別(內容,用戶,角色)。還是謝謝你的回答。 – Haidy 2013-05-14 14:20:26