审计时插入空值答案

【问题标题】：null values inserted while auditing审计时插入空值
【发布时间】：2018-09-21 09:37:34
【问题描述】：

我的审计监听器

public class EmployeeAuditListeners {
@PrePersist
public  void prePersist(Employee employee){
    perform(employee,Action.INSERTED);
}

@PreUpdate
public void preUpdate(Employee employee){
    perform(employee,Action.UPDATED);
}

@PreRemove
public void preRemove(Employee employee){
    perform(employee,Action.DELETED);
}

@Transactional
public void  perform(Employee emp, Action action){
    EntityManager em = BeanUtil.getBean(EntityManager.class);
    CommonLogs commonLogs = new CommonLogs();
    commonLogs.setQuery("new query");
    em.persist(commonLogs);
}
}

和我的Auditable.class

@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
public abstract class Auditable<U> {

    @CreatedBy
    protected U createdBy;

    @CreatedDate
    @Temporal(TemporalType.TIMESTAMP)
    protected Date createdDate;

    @LastModifiedBy
    protected U lastModifiedBy;

    @LastModifiedDate
    @Temporal(TemporalType.TIMESTAMP)
    protected Date lastModifiedDate;
}

我的CommonLogs.class

@Entity 
@EntityListeners(AuditingEntityListener.class)

public class CommonLogs extends Auditable<String> {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;


    private  String query;


    public CommonLogs() {
    }

    public CommonLogs(String query) {
        this.query = query;
    }

    public Long getId() {
        return id;
    }

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

    public String getQuery() {
        return query;
    }

    public void setQuery(String query) {
        this.query = query;
    }
}

我的 Employee.java 类

@Entity
@EntityListeners(EmployeeAuditListeners.class)
public class Employee {


    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String name;
    private String address;

    public Long getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

我有一个简单的 Rest Controller

@RestController
@RequestMapping("/api")
public class EmployeeController {


    @Autowired
    private EmployeeRepository employeeRepository;

    @PostMapping("/employees")
    public Employee createEmployee(@RequestBody Employee employee){
        return employeeRepository.save(employee);
    }
}

每次我对我的 Employee Entity 执行一些 crud 操作时，我都想将它记录在我的表 (common_logs) 上。

上面给出的示例在某种程度上是有效的，因为它成功地存储了员工并调用了 EmployeeAuditListeners。

但现在在保存 CommongLog 实体时，我希望它的父类 Auditable 可以自动插入 createdBy、createdDate 等。现在只有查询和 id 被插入到 common_logs 表中，其余列为空。

【问题讨论】：

标签： spring-boot spring-data-jpa

【解决方案1】：

您可以查看here 中的审核文档。

要启用自动审核，您必须在您的应用程序类中添加注释@EnableJpaAuditing：

@SpringBootApplication
@EnableJpaAuditing
class Application {

    static void main(String[] args) {
        SpringApplication.run(Application.class, args)
    }
}

如果您还需要@CreatedBy 和@LastModifiedBy 字段，您还需要实现AuditorAware<T> 接口。例如：

class SpringSecurityAuditorAware implements AuditorAware<User> {

  public User getCurrentAuditor() {

    Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

    if (authentication == null || !authentication.isAuthenticated()) {
      return null;
    }

    return ((MyUserDetails) authentication.getPrincipal()).getUser();
  }
}

【讨论】：