Question

我有两个实体Employee和Department，每个实体都有一个Spring Web @RestController注释的类，带有更新方法，即Http PUT。

由于某些奇怪的原因（可能是一个显而易见的解决方案），每当为PUT类调用Employee时，JSON有效负载中的ID均未映射到id类Employee实体，但它对于Department实体来说效果很好。

Employee类：

Entity
@Table(name = "EMPLOYEE")
public class Employee implements Serializable, Identity<Long>, Deleted
{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "NAME")
    private String name;

    @ManyToOne
    @Where(clause = "is_deleted = false")
    private Department department;

    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(name = "EMP_QUAL", joinColumns = @JoinColumn(name = "EMPLOYEE_ID"), inverseJoinColumns = @JoinColumn(name = "QUALIFICATION_ID"))
    @WhereJoinTable(clause = "IS_DELETED = false")
    @SQLDelete(sql = "UPDATE `EMP_QUAL` SET IS_DELETED = true where EMPLOYEE_ID = ? and QUALIFICATION_ID = ? and IS_DELETED = False")
    private Set<Qualification> qualifications;

    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(name = "EMP_PROJ", joinColumns = @JoinColumn(name = "emp_id"), inverseJoinColumns = @JoinColumn(name = "proj_id"))
    @Where(clause = "is_deleted = false")
    private Set<Project> projects;

    @JsonIgnore
    @Column(name = "is_deleted", nullable = false)
    private Boolean isDeleted = false;

    @Override
    public Long getId()
    {
        return this.id;
    }

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

    public String getName()
    {
        return name;
    }

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

    public Set<Project> getProjects()
    {
        return projects;
    }

    public void setProjects(final Set<Project> projects)
    {
        this.projects = projects;
    }

    public Department getDepartment()
    {
        return department;
    }

    public void setDepartment(final Department department)
    {
        this.department = department;
    }

    public Set<Qualification> getQualifications()
    {
        return qualifications;
    }

    public void setQualifications(final Set<Qualification> qualifications)
    {
        this.qualifications = qualifications;
    }

    public Boolean isDeleted()
    {
        return isDeleted;
    }

    public void setDeleted(final Boolean deleted)
    {
        isDeleted = deleted;
    }

}

Department类：

@Entity
@Table(name = "DEPARTMENT")
public class Department implements Serializable, Identity<Long>, Deleted
{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    @OneToMany(fetch = FetchType.EAGER)
    @WhereJoinTable(clause = "is_deleted = false")
    @JoinTable(name = "DEPARTMENT_EMPLOYEE", joinColumns = {@JoinColumn(name = "department_id")},
            inverseJoinColumns = {@JoinColumn(name = "employee_id")})
    @SQLDelete(sql = "UPDATE DEPARTMENT_EMPLOYEE SET is_deleted = true where department_id = ? and employee_id = ? and is_deleted = false")
    private Set<Employee> departmentMembers;

    @Column(name = "is_deleted", nullable = false)
    private Boolean isDeleted;

    @Override
    public Long getId()
    {
        return this.id;
    }

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

    @Override
    public Boolean isDeleted()
    {
        return this.isDeleted;
    }

    @Override
    public void setDeleted(final Boolean isDeleted)
    {
        this.isDeleted = isDeleted;
    }

    public String getName()
    {
        return name;
    }

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

    public Set<Employee> getDepartmentMembers()
    {
        return departmentMembers;
    }

    public void setDepartmentMembers(final Set<Employee> departmentMembers)
    {
        this.departmentMembers = departmentMembers;
    }
}

致电PUT /employees/{id}时：

呼叫PUT /departments/{id}：

正如您在调试器的屏幕快照中看到的那样，填充了id的{{1}}字段，而在Department中则为空。我正在使用Swagger进行测试，并在有效负载中设置了ID。我没有任何特定的Jackson配置设置，我只使用Spring boot的默认设置，但是我无法弄清楚为什么仅在Employee中Employee字段从未映射过。

id正文：

Employee

{ "id":1, "name": "New Name" }正文：

Department

Answer 1

该问题是由于与另一个实体@JsonIdentityInfo有关系的另一个实体Project上的Jackson注释Employee：

@Entity
@Table(name = "PROJECT")
public class Project implements Serializable, Identity<Long>, Deleted
{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(name = "EMP_PROJ", joinColumns = @JoinColumn(name = "proj_id"), inverseJoinColumns = @JoinColumn(name = "emp_id"))
    @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = "id")
    @Where(clause = "is_deleted = false")
    private Set<Employee> employees;

在Spring-Boot控制器中未为特定实体映射@Id

1 个答案: