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请通过下面的简单场景,我找不到更好的方式来以文本形式提出问题:

两个域对象和一个事务服务:

A {
 int id
 String prop1
 B b
 static constraints = {b nullable:true}
}

B {
 int id
 String prop1
 // not worring about belongsTo here
}



SomeService {

 def transactional = true
 def sessionFactory

 def aTransactionalMethod() {
  Sql sql = new Sql(sessionFactory.currentSession.connection())

  sql# create A some how with sql query leaving property b as null.

 A a = A.findById(...)
 //a.b must be null here, never mind

 sql# create B object somehow with sql query.

 // should a.b be available now? I'm getting null here.. session.currentSession.refresh(a) resolves the issue but why is that?
 }
}
4

1 回答 1

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Hibernate 无法解析 SQL,因此它不“知道”您写入数据库的内容。Hibernate 不会重新加载所有会话对象——那肯定是巨大的开销。

也许如果您将查询重写为 HQL,则对象将立即可用于会话。

于 2011-02-21T10:44:39.093 回答