2017-06-20 86 views
0

我正在使用JPA和Spring從「角色」中檢索「特性」列表。但是,當我想從我的應用程序獲取此列表,它返回我的空單,而我找回的東西,當我從SQL客戶端執行生成的SQL請求用Spring返回的空集合JPA

這裏是我的數據模型:

特點: - ID(PK) - 姓名 - 描述

AD_ROLE: - ID(PK) - 姓名

FEATURE_AD_ROLE - FEATURE_ID(FK到FEATURE.id) - ad_role_id(FK到AD_ROLE.id)

我的實體是:

@Entity 
@Table(name = "FEATURE") 
public class Feature implements Serializable { 

    private static final long serialVersionUID = 1L; 

    @Id 
    private int id; 

    private String name; 
    private String description; 

    @ManyToMany 
    @JoinTable(name = "FEATURE_AD_ROLE", joinColumns = @JoinColumn(name = "FEATURE_ID", referencedColumnName = "ID"), inverseJoinColumns = @JoinColumn(name = "AD_ROLE_ID", referencedColumnName = "ID")) 
    private Collection<ADRole> adRoles; 

    // getter/setters 
} 


@Entity 
@Table(name = "AD_ROLE") 
public class ADRole implements Serializable { 

    private static final long serialVersionUID = 1L; 

    @Id 
    private int id; 

    private String name; 

    @ManyToMany(mappedBy = "adRoles") 
    private List<Feature> features; 

    // getters/setters 
} 

吾道:

@Repository 
public interface FeatureDao extends JpaRepository<Feature, Long> { 

    @Query("SELECT f FROM Feature f JOIN f.adRoles fa WHERE fa.name = :adProfile") 
    public Collection<Feature> getFeaturesByADProfile(@Param("adProfile") String adProfile); 

} 

這會產生這樣的SQL請求:

select feature0_.id as id1_1_, feature0_.description as description2_1_, feature0_.name as name3_1_ from FEATURE feature0_ inner join FEATURE_AD_ROLE adroles1_ on feature0_.id=adroles1_.FEATURE_ID inner join AD_ROLE adrole2_ on adroles1_.AD_ROLE_ID=adrole2_.id where adrole2_.name=? 

當我從SQL客戶端執行此請求,我可以看到結果。

我的DBMS是Oracle。

你能幫助我嗎?

回答

0

其實,沒關係。今天早上,我發現這是因爲我從我的SQL客戶端添加了條目,而我沒有提交事務。 :(

這只是...尷尬