java - Hibernate在事务提交时删除集合元素

我不知道为什么冬眠试图在事务提交后删除集合元素。我什至不要求它这样做。

有任何想法吗？

技术细节在下面发布。

休眠方言：

    org.hibernate.dialect.SQLServerDialect

实体类：

    @Entity
    @Table(name = "View_m_activity", schema = "model")
    public class SourceActivity {
        private Set<SourceActivityAttrOut> outputAttributes;

        private Long ID;

        @Id
        public Long getID() {
            return ID;
        }

        public void setID(Long ID) {
            this.ID = ID;
        }

        @ElementCollection(fetch = FetchType.EAGER)
        @CollectionTable(name = "View_m_activity_attr_out", schema = "model", joinColumns = @JoinColumn(name = "activity_id"))
        public Set<SourceActivityAttrOut> getOutputAttributes() {
            return outputAttributes;
        }

        public void setOutputAttributes(Set<SourceActivityAttrOut> outputAttributes) {
            this.outputAttributes = outputAttributes;
        }
    }

集合元素实体类：

    @Embeddable
    public class SourceActivityAttrOut {
        private String code;

        public String getCode() {
            return code;
        }

        public void setCode(String code) {
            this.code = code;
        }
    }

执行代码：

    @Transactional
    public void readSource(SourcePool sourcePool) {
        sessionFactory.getCurrentSession().createQuery("from SourceActivity", SourceActivity.class).list();
    }

日志信息：

Hibernate:
    select
        sourceacti0_.ID as ID1_0_
    from
        model.View_m_activity sourceacti0_

Hibernate:
    select
        outputattr0_.activity_id as activity1_1_0_,
        outputattr0_.code as code2_1_0_
    from
        model.View_m_activity_attr_out outputattr0_
    where
        outputattr0_.activity_id=?

Hibernate:
    select
        outputattr0_.activity_id as activity1_1_0_,
        outputattr0_.code as code2_1_0_
    from
        model.View_m_activity_attr_out outputattr0_
    where
        outputattr0_.activity_id=?

Hibernate:
    select
        outputattr0_.activity_id as activity1_1_0_,
        outputattr0_.code as code2_1_0_
    from
        model.View_m_activity_attr_out outputattr0_
    where
        outputattr0_.activity_id=?

Hibernate:
    select
        outputattr0_.activity_id as activity1_1_0_,
        outputattr0_.code as code2_1_0_
    from
        model.View_m_activity_attr_out outputattr0_
    where
        outputattr0_.activity_id=?

Hibernate:
    delete
    from
        model.View_m_activity_attr_out
    where
        activity_id=?

最佳答案

问题原因在here中描述

很快，为了解决该问题，我不得不重写哈希码和SourceActivityAttrOut的等价物。