Jpa Ebean继承“无readMethod的抽象类”异常

我试着在游戏中使用Ebean的继承！框架2.1.0。继承策略是单表的，因为它是Ebean唯一支持的策略。我紧跟着美国的榜样

这段代码通过了编译，但我得到了

RuntimeException: Abstract class with no readMethod for models.Price.id
com.avaje.ebeaninternal.server.deploy.ReflectGetter.create(ReflectGetter.java:33)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1353)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createByteCode(BeanDescriptorManager.java:1142)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readDeployAssociations(BeanDescriptorManager.java:1058)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentAssociations(BeanDescriptorManager.java:565)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:252)

 com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:124)
    com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:210)

 com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:64)

 com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:59)

 play.db.ebean.EbeanPlugin.onStart(EbeanPlugin.java:79) 

Google search带来了ReflectGetter.java的源代码。那里的评论说

对于持有id属性的抽象类，我们有时需要使用反射来获取id值

这提供了BeanReflectGetter对象来实现这一点

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若我从超类声明中删除抽象关键字，异常就会消失。我真的不想让超类具体化。

为id字段添加getter/setter，它就会消失。

为id字段添加getter/setter，它就会消失。

我应该想到这一点。谢谢我应该想到的。谢谢

RuntimeException: Abstract class with no readMethod for models.Price.id
com.avaje.ebeaninternal.server.deploy.ReflectGetter.create(ReflectGetter.java:33)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1353)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createByteCode(BeanDescriptorManager.java:1142)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readDeployAssociations(BeanDescriptorManager.java:1058)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentAssociations(BeanDescriptorManager.java:565)

 com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:252)

 com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:124)
    com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:210)

 com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:64)

 com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:59)

 play.db.ebean.EbeanPlugin.onStart(EbeanPlugin.java:79)