NHibernate映射与分叉继承模型 [英] NHibernate mapping with forking inheritance model

问题描述

我只是从NHibernate开始，正在尝试为我的模型进行映射. (这是一种模型优先的TDD方法，现在就创建数据库)

I'm just starting out with NHibernate and am trying to do a mapping for my model. (this is a model-first, TDD approach, just creating the database now)

我的班级等级类似:

我正在尝试找出如何现在使用映射xml文件对此进行映射?

I'm trying to work out how to map this now using a mapping xml file?

这是我的桌子，我想让他们映射到

This is my table and what I want them to map to

QuestionId-整数-[Question.Id]

QuestionId - Int - [Question.Id]

PmqccFormId-整数-[Question.PmqccForm.Id]

PmqccFormId - Int - [Question.PmqccForm.Id]

InputAnswer-Int-[NormalQuestion.InputtedAnswer或JobVelocityQuestion.InputtedAnswer -它们都是将转换为int或从int转换的枚举，可以根据需要将它们分成单独的列]

InputtedAnswer - Int - [NormalQuestion.InputtedAnswer or JobVelocityQuestion.InputtedAnswer - they are both enums that will be converted to/from ints, can separate these into separate columns if need be]

ResponsibleStaffId -Int-[PiAlertQuestion.ResponsibleStaffMember.Id]

ResponsibleStaffId -Int - [PiAlertQuestion.ResponsibleStaffMember.Id]

说明-varchar-[Question.Explanation]

Explanation - varchar - [Question.Explanation]

QuestionType-varchar-[Discriminator]

QuestionType - varchar - [Discriminator]

我不确定如何映射它，因为它有点分叉.还有更多的"Question"对象，它们都从YesNoQuestion或NormalQuestion继承，但不再添加属性，仅添加方法实现.

I'm not sure how to map this given it forks a a bit. There are a heap more 'Question' objects that all inherit from YesNoQuestion or NormalQuestion but don't add anymore properties, just methods implementations.

我猜我对Question基类有一个，然后在那个基类下有一个?棘手的是JobVelocityQuestion从Question继承.谁能指出我正确的方向?

I'm guessing I have a for the Question base class and then have ones under that? the tricky bit is the JobVelocityQuestion inheriting from Question. Can anyone point me in the right direction?

推荐答案

这应该使您入门:

<class name="Question">
  ...
  <discriminator column="QuestionType"/>
  <subclass name="JobVelocityQuestion">
    <property name="InputtedAnswer"/>
  </subclass>
  <subclass name="NormalQuestion">
    <property name="InputtedAnswer"/>
    <subclass name="AsConsQuestion"/>
    ...
  </subclass>

我做了很多假设，但是应该可以.随时提出进一步的要求.

I made many assumptions, but it should work. Feel free to ask further.

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