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Hibernate引发MultipleBagFetchException-无法同时获取多个包
Hibernate在创建SessionFactory时抛出此异常： org.hibernate.loader.MultipleBagFetchException：无法同时获取多个包 这是我的测试用例： Parent.java @Entity public Parent { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Long id; @OneToMany(mappedBy="parent", fetch=FetchType.EAGER) // @IndexColumn(name="INDEX_COL") if I had this the problem solve but I retrieve more children than I have, one child is null. private List<Child> children; } Child.java @Entity public Child { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Long id; …
471
java
hibernate
jpa
one-to-many
bag