将Hibernate 3迁移到5:不存在hibernate_sequence关系

问题描述

我正在将运行Hibernate 3的应用程序迁移到Hibernate 5.

I am migrating an application running with Hibernate 3 to Hibernate 5.

我有一个奇怪的错误:

我们正在使用*.hbm.xml映射文件，并且一切正常，直到我更改了Hibernate版本.我的意思是我们使用ID列和DB序列生成器进行了非常简单的映射，但是Hibernate仍然无法选择正确的配置.

We are using *.hbm.xml mapping files and everything was working fine until I changed the Hibernate version. I mean we have a pretty straight forward mapping with ID column and DB sequence generator and still Hibernate wasn't able to pick the correct config.

<hibernate-mapping>
    <class name="com.boyan.MyClass" table="my_class">
       <id name="id" type="long">
            <column name="id" />
            <generator class="sequence">
               <param name="sequence">my_class_seq</param>
            </generator>
        </id>
...
    </class>
</hibernate-mapping>

推荐答案

我开始研究Hibernate代码，发现不赞成使用SequenceGenerator，而新版本使用的是SequenceStyleGenerator.当我注意到在新版本中，告诉哪个序列名称的属性从sequence更改为sequence_name时，我感到非常困惑.所以最后，当我改变时:

I started digging in the Hibernate code and saw that SequenceGenerator is deprecated and the new versions use SequenceStyleGenerator. I was very confused when I noticed that in the new version the property telling which is the sequence name is changed from sequence to sequence_name. So finally when I changed:

<param name="sequence">my_class_seq</param>

收件人:

<param name="sequence_name">my_class_seq</param>

一切正常.

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