@Id 未映射到 Spring-Boot 控制器中的特定实体

Question

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

由于某种奇怪的原因（并且可能是一个非常明显的解决方案），每当为 Employee 类调用 PUT 时，JSON 有效负载中的 ID 不会映射到 Employee 实体的 id 类但它非常适合Department 实体。

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;
    }
}

拨打PUT /employees/{id}时：

致电PUT /departments/{id}:

正如您在调试器的屏幕截图中所见，Department 的 id 字段已填充，而 Employee 中的字段为空。我正在使用 Swagger 对此进行测试，并在有效负载中设置 ID。我没有任何特定的 Jackson 配置集，我只使用 Spring Boot 的默认设置，但我无法弄清楚为什么只有在 Employee 中，id 字段从未映射。

Employee正文：

{
"id":1,
  "name": "New Name"
}

Department正文：

{
"id":2,
  "name": "chemistry",
"deleted":false
}

Answer 1

问题是由于另一个实体 Project 上的 Jackson 注释 @JsonIdentityInfo 与 Employee 有关系：

@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;