Question

下面是两个表，其中定义了表之间的映射。我想写一个JPA查询，我可以通过它查询基于userProfile的所有数据。我的查询如下

firstElement.Content = passData.Data;

            base.OnNavigatedTo(args);

这样做并没有给出理想的结果。这是我的实体

@Repository("userEthnicityRepository")
public interface UserEthnicityRepository extends JpaRepository<UserEthnicity, Long> {

    @Query("select e from UserEthnicity ue where ue.userProfile = ?1 ")
    Set<UserEthnicity> findByUserProfile(UserProfile userProfile);
}

和

@Entity
public class UserProfile implements Serializable {
    @Id
    private Long id;
    public Long getId() {
        return id;
    }

public void setId(Long id) {
    this.id = id;
}

@Index(name = "ethnicity")
private Ethnicity ethnicity;

public Ethnicity getEthnicity() {
    return ethnicity;
}

public void setEthnicity(Ethnicity ethnicity) {
    this.ethnicity = ethnicity;
}

@OneToMany(mappedBy = "userProfile", fetch = FetchType.EAGER)
private Set<UserEthnicity> userEthnicity;

public Set<UserEthnicity> getUserEthnicity() {
    return userEthnicity;
}

public void setUserEthnicity(Set<UserEthnicity> userEthnicity) {
    for (UserEthnicity userEthnicityOne : userEthnicity) {
        userEthnicityOne.setUserProfile(this);
    }
    this.userEthnicity = userEthnicity;
}
}

和种族有些枚举

 @Entity
public class UserEthnicity implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

@Index(name = "ethnicity")
private Ethnicity ethnicity;

@ManyToOne(fetch = FetchType.EAGER, targetEntity = UserProfile.class)
UserProfile userProfile;

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public Ethnicity getEthnicity() {
    return ethnicity;
}

public void setEthnicity(Ethnicity ethnicity) {
    this.ethnicity = ethnicity;
}

public UserProfile getUserProfile() {
    return userProfile;
}

public void setUserProfile(UserProfile userProfile) {
    this.userProfile = userProfile;
}}

Answer 1

你只需要

UserEthnicity findByUserProfileId(Long id)

或

UserEthnicity findByEthnicityId(Long id)

Spring JPA将在CAPs案例中拆分搜索字符串，因此find-By-UserProfile-Id

或

UserEthnicity findByEthnicityIdAndUserProfileId(Long ethnicityId, Long profileId)

有关查询方法的完整定义，请参阅here。

如何使用映射属性从Spring Repository获取数据

1 个答案: