HibernateException:当 GORM 查询移动到另一个域类时，没有找到当前线程的会话 [英] HibernateException: No Session found for current thread when GORM query moved into another domain class

问题描述

在grails中，我有一个Domain类，可以在BootStap.groovy中查询

In grails, I have a Domain class and can be queried in BootStap.groovy

def xref = AppXref.find{user_nm == 'john'}

但是，一旦我将代码移动到另一个域类的方法中，就会出现以下错误.

However, once I moved the code into a method of another Domain class I will have the following error.

Servlet.service() for servlet [default] in context with path [/myapp] threw exception
Message: Could not obtain current Hibernate Session; nested exception is org.hibernate.HibernateException: No Session found for current thread

这是我在 Config.groovy 中的休眠配置

Here is my hibernate config in Config.groovy

hibernate {
    cache.use_second_level_cache = true
    cache.use_query_cache = false
//    cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory' // Hibernate 3
    cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory' // Hibernate 4
    singleSession = true // configure OSIV singleSession mode
    flush.mode = 'manual' // OSIV session flush mode outside of transactional context
}

我将 cache.use_query_cache 更改为 true.但这没什么区别.

I changed cache.use_query_cache to true. But it made no difference.

推荐答案

域类方法不是事务性的，因此您必须确保它们是在 TX 上下文中调用的:要么将它们放在服务中，要么使用.withTransaction{}

domain class methods are NOT transactional, so you have to make sure, that they are invoked in a TX-context: either put them in a service, or use .withTransaction{}

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