无法设置字段值[null，permissions=[]}]

Question

我有一个类用户，它有一个角色，角色有一个权限列表(enum)，当我试图通过ID获取一个用户时，我会得到一个错误！在我的数据库中，数据是可以的，我有一个创建了rol的用户。

@Getter
@Setter
@Entity
@Table(name = "usuarios")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String password;
    @ManyToOne(targetEntity= com.ecommerce.model.Role.class)
    private Role role;

@Getter
@Setter
@Entity
@Table(name = "roles")
public class Role {
    @Id
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private Long id;
    @Column(name = "rol")
    @Enumerated(EnumType.STRING)
    private RoleType role;
    @Column(name = "permisos")
    @Enumerated(EnumType.STRING)
    @ElementCollection(targetClass = Permission.class)
    private List<Permission> permissions;

public enum RoleType {
    manager,
    seller,
    buyer
}

There was an unexpected error (type=Internal Server Error, status=500).
Could not set field value [null, permissions=[]}] value by reflection : [class com.ecommerce.model.User.role] setter of com.ecommerce.model.User.role; nested exception is org.hibernate.PropertyAccessException: Could not set field value [null, permissions=[]}] value by reflection : [class com.ecommerce.model.User.role] setter of com.ecommerce.model.User.role
org.springframework.orm.jpa.JpaSystemException: Could not set field value [null, permissions=[]}] value by reflection : [class com.ecommerce.model.User.role] setter of com.ecommerce.model.User.role; nested exception is org.hibernate.PropertyAccessException: Could not set field value [null, permissions=[]}] value by reflection : [class com.ecommerce.model.User.role] setter of com.ecommerce.model.User.role

Answer 1

这解决了spring.jackson.serialization.fail-on-empty-beans=false的问题