教條2按關聯標籤排序

Question

我有兩個學說實體'用戶'和'屬性'，如下所示。我需要構造一個查詢來檢索所有用戶，並按屬性名稱排序，其中屬性type = x。例如，獲取所有用戶並按'標題'排序。

SELECT u FROM User u JOIN u.attributes a ORDER BY a.name {something??} a.type = 'title' 


class User { 

    /** 
    * @ManyToMany (targetEntity="Attribute", inversedBy="users", cascade={"persist"}) 
    * 
    */ 
    private $attributes; 
} 



class Attribute { 

    /** 
    * @Column (type="string", length=255, unique=false, nullable=false, name="name") 
    * @FormElement (type="text") 
    * @type string 
    */ 
    protected $name; 

    /** 
    * @Column (type="string", unique=false, nullable=true, name="type") 
    * @type string 
    */ 
    private $type; 

    /** 
    * @Column (type="integer", length=11, unique=false, nullable=true, name="priority") 
    * @type integer 
    */ 
    private $priority; 

    /** 
    * @ManyToMany (targetEntity="User", mappedBy="attributes") 
    */ 
    private $users; 

} 

Answer 1

我覺得這個查詢你在找什麼：

SELECT u FROM User u JOIN u.attributes a WHERE a.type = 'title' ORDER BY a.name ASC