Question

我正在为嵌套集合“无法同时获取多个包”。这是实体和实体图定义的样子。 Hibernate版本：4.3.7 spring-data-jpa：1.8.1 “

@Entity
@Table(name = "ORGANISATION_GROUP")
@Where(clause = "IS_DELETED <> 1")
@NamedEntityGraphs(value = { @NamedEntityGraph(name = "onlyOrganisations", attributeNodes = { @NamedAttributeNode(value = "organisations", subgraph = "lightOrganisation") },
        subgraphs = { @NamedSubgraph(name = "lightOrganisation", attributeNodes = { @NamedAttributeNode(value = "locations") }) }) })
public class OrganisationGroup implements Serializable{

    private static final long serialVersionUID = 1L;

    @Id
    private Long id;

    @ManyToMany()
    @AuditJoinTable(name = "ORGANISATION_GROUP_MEMBER_AUD")
    @JoinTable(name = "ORGANISATION_GROUP_MEMBER", joinColumns = @JoinColumn(name = "ORGANISATION_GROUP_ID", referencedColumnName = "ID"), inverseJoinColumns = @JoinColumn(
            name = "ORGANISATION_ID", referencedColumnName = "ID"))
    private List<Organisation> organisations = new ArrayList<>(0);

}

@Entity
@Table(name = "ORGANISATION")
public class Organisation implements Serializable {

    private static final long serialVersionUID = 1L;
    @Id
    private Long id;

    @Column(name = "name", length = 255, nullable = false)
    private String name;

    @OneToMany( mappedBy = "organisationId", cascade = CascadeType.ALL, orphanRemoval = true)
    @OrderBy(value = "location ASC")
    private List<OrganisationLocation> locations;

}

@Entity
@Table(name = "ORGANISATION_LOCATIONS")
public class OrganisationLocation implements Serializable {
    private static final long serialVersionUID = 1L;

   @Id
   private Long id;

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

 }

` 我尝试在location属性上使用@LazyCollection，但仍然得到相同的异常。但是，同样的事情在没有实体图并且将位置设置为fetch eager类型的情况下工作。如何使用实体图解决此错误？

Answer 1

除非您有充分的理由不这样做，否则请尝试更改您的收藏集以使用Set代替List。

NamedEntityGraph：Hibernate throw不能同时为嵌套集合获取多个包异常

1 个答案: