使用SPRING DATA JPA在保存/更新期间刷新实体

Question

我在Spring Boot中使用Spring Data JPA。

在使用Spring Data Jpa存储库将一个实体保存到数据库后，我不会得到整个实体。即只获取我传递给save（）的值。

@Entity
@Table(name = "enterprise")
public class Enterprise extends BaseEntity implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "enterprise_id")
    private Long enterpriseId;
    @Column(name = "enterprise_external_name", length = 150, unique = true)
    @NotNull
    private String enterpriseExternalName;
    @Column(name = "enterprise_internal_name", length = 150, unique = true)
    @NotNull
    private String enterpriseInternalName;
    @OneToMany(mappedBy = "enterprise")
    @JsonIgnoreProperties(allowSetters = true, value = { "enterprise" })
    private Set<Organization> organizations;
    //getter and setters
}

组织实体：

@Entity
@Table(name = "organization")
public class Organization extends BaseEntity implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "organization_id")
    private Long organizationId;
    @Column(name = "organization_name", length = 150, unique = true)
    @NotBlank(message = "OrganizationName can't be empty !")
    private String organizationName;
    @ManyToOne
    @JoinTable(name = "enterprise_organization", joinColumns = {
            @JoinColumn(name = "organization_id") }, inverseJoinColumns = { @JoinColumn(name = "enterprise_id") })
    @JsonIgnoreProperties(allowSetters = true, value = { "organizations" })
    private Enterprise enterprise;
    //getters and setters
}

控制器类：

@PostMapping
public ResponseEntity<ValidationResponse> addOrganization(@Valid @RequestBody Organization organization)
{
    ValidationResponse response = new ValidationResponse();
    response.setMessage(organizationService.addOrganization(organization));

    return new ResponseEntity<ValidationResponse>(response, HttpStatus.CREATED);
}

服务类别：

@Service
@Transactional(propagation = Propagation.REQUIRED)
public class OrganizationServiceImpl implements OrganizationService {
    @PersistenceContext
    private EntityManager entityManager;
    @Autowired
    private OrganizationRepository organizationRepository;      
    public Organization addOrganization(Organization organization) {
        organization.setCreatedDate(Calendar.getInstance());
        organizationRepository.save(organization);
        entityManager.refresh(organization);
        return organization;
    }
}

@Repository
public interface OrganizationRepository extends JpaRepository<Organization, Long> {
}

{
    "organizationName":"org5",
    "enterprise":{
        "enterpriseId":2
    }
}

{
    "success": true,
    "message": {
        "createdBy": 0,
        "updatedBy": 0,
        "createdDate": 1510140158654,
        "updatedDate": null,
        "organizationId": 14,
        "organizationName": "org5",
        "enterprise": {
            "createdBy": 0,
            "updatedBy": 0,
            "createdDate": null,
            "updatedDate": null,
            "enterpriseId": 2,            
            "enterpriseName": null,
            "active": true
        },
        "active": true
    },
    "errors": null
}

Answer 1

你在哪里创建你的“组织”对象？。如果您在addOrganization（）方法中创建或检索，然后执行save，那么您应该没有问题。作为最佳实践，服务层应该处理域对象而不是控制器，除非您使用OpenSessionInViewFilter将域传递给controller和View。