我可以在 class 中使用相同的 mapedBy 名称吗？

Question

我收到此错误，但不确定是否是因为 mappedBy 的名称与属性相同

错误

Caused by: org.hibernate.MappingException: Could not determine type for: java.util.Collection, at table: a_escalaPregunta, for columns: [org.hibernate.mapping.Column(valoracioItems)]

Class EscalaPregunta

@Entity
@Table(name = "a_escalaPregunta")
public class EscalaPregunta extends BaseEntity {

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

    @Column(length = 255)
    private String pregunta;

    @OneToMany(mappedBy = "pregunta", cascade = CascadeType.ALL)
    private Collection<EscalaResposta> respostes;

    @OneToMany(mappedBy = "pregunta", cascade = CascadeType.PERSIST)
    private Collection<ValoracioItem> valoracioItems;

    @Id
    public Long getId(){
       return id;
    }

Class EscalaResposta

@Entity
@Table(name = "a_escalaResposta")
public class EscalaResposta extends BaseEntity {

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

    @ManyToOne(optional = false)
    @JoinColumn(name = "idEscalaPregunta", referencedColumnName = "id", nullable = false)
    private EscalaPregunta pregunta;

Class ValoracioItem

@Entity
@Table(name = "t_valoracioitem")
public class ValoracioItem extends BaseEntity {

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

    @ManyToOne(cascade = CascadeType.PERSIST, optional = false)
    @JoinColumn(name = "idEscalaPregunta", nullable = false)
    private EscalaPregunta pregunta;

Answer 1

您在 ValoracioItem 实体中缺少以下属性

referencedColumnName = "id"

应该是这样的

    @ManyToOne(cascade = CascadeType.PERSIST, optional = false)
    @JoinColumn(name = "idEscalaPregunta", referencedColumnName = "id", nullable = false)
    private EscalaPregunta pregunta;

Answer 2

问题是注解@Id在属性和getter方法中重复了。

我可以在 class 中使用相同的 mapedBy 名称吗？

Can I use same mapedBy name in a class?

mapping

hibernate

java-ee-7