object references an unsaved transient instance - save the transient instance before flushing: user.pojo.HotelGoodsCatalog; nested exception is org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: user.pojo.HotelGoodsCatalog
今天遇到修改对象的时候，hibernate报有关联的对象没有保存，其原因为hibernate在更新一个对象的时候，会去检查它所有关联的对象在数据库中是否存在，如果不存在就会报先让你保存这个对象，然后再保存此对象。也可以将cascade="none" 设为其它，如save-update等等，但是这种方法最好不要用（以上只是我个人的理解）
补充：
另外一种情况也会发生此错误，即：当你保存一个对象时User，User关联一个Card对象，而Card对象是增加了乐观锁，如果新建了一个Card对象放进User中，而Card中乐观锁的属性为null的话，这时你需要将其属性设定一个值，最好从数据库中取出
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