使用 nativeJPQL 删除查询时出现异常

Question

我尝试使用 nativeQuery 删除，但我有这个异常：

org.springframework.dao.InvalidDataAccessApiUsageException: Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:403)
    ...................
Caused by: javax.persistence.TransactionRequiredException: Executing an update/delete query
    at org.hibernate.internal.AbstractSharedSessionContract.checkTransactionNeededForUpdateOperation(AbstractSharedSessionContract.java:413)
    at org.hibernate.query.internal.AbstractProducedQuery.executeUpdate(AbstractProducedQuery.java:1668)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
...............

我的员工实体：

@Entity
public class Employe implements Serializable{

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    
    private String prenom;
    
    private String nom;
    
    private String email;
    
    private int isActif;
    
    @Enumerated(EnumType.STRING)
    private Role role;

    @OneToOne(mappedBy ="employe", cascade = CascadeType.REMOVE)
    Contrat contrat;
    
    @ManyToMany( mappedBy="employes", fetch= FetchType.EAGER , cascade = {CascadeType.PERSIST })
    private List<Departement> departements;
    
    @ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE ,CascadeType.REMOVE})
    List<Mission> missions;
.........

我的部门实体：

@Entity
public class Departement implements Serializable{

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    
    private String name;
    
    @ManyToOne( cascade = {CascadeType.PERSIST, CascadeType.MERGE} )
    private Entreprise entreprise;
    
    @OneToMany( mappedBy="departement", cascade = {CascadeType.PERSIST, CascadeType.MERGE})
    private List<Mission> missions;
    
    @ManyToMany(fetch = FetchType.EAGER, cascade = {CascadeType.PERSIST, CascadeType.MERGE})
    private List<Employe> employes;
    

我的服务：

@Autowired IEmployeRepository empRep； …… @覆盖 公共无效 deleteEmployerById(int id) { 雇员 e = empRep.findById(id).orElse(null); // 删除该作者的所有关联 empRep.deleteEmployerDepartementsAssociations(id); empRep.delete(e); }

我的 EmployeRepository：

@Repository 公共接口 IEmployeRepository 扩展 CrudRepository{

 @Modifying
 @Query(value = "DELETE FROM departement_employes WHERE employes_id = :id ", nativeQuery = true)
 void deleteEmployerDepartementsAssociations(@Param("id") int id );
 

}

只有删除查询不起作用，我正在尝试删除与某个员工关联的所有部门。

员工与部门的关联是多对多双向关联。

我正在尝试在删除员工之前删除关联

Answer 1

尝试以这种方式更正您的查询：

@Modifying
@Query(value = "DELETE FROM departement_employes WHERE employes_id = :id ", nativeQuery = true)
void deleteEmployerDepartementsAssociations(@Param("id") int id );

您必须将任何数据库修改操作包装在事务中。例如看这个article。

因此，作为一种可能的方法，您可以通过@Transactional 注释来注释您的服务方法：

@Override
@Transactional
public void deleteEmployerById(int id) {
   // ...
}