在与域对象不同的程序集中定义NHibernate映射 [英] define NHibernate mappings in different assembly than the domain objects

问题描述

我有一个程序集 Foo.Bar ，其中包含我的所有域逻辑和域对象(例如public class Project，public interface IProjectRepository).

I have an assembly Foo.Bar that holds all my domain logic and my domain object (e.g. public class Project, public interface IProjectRepository).

我还有一个程序集 Foo.Bar.Data ，它充当我的NHinbernate数据访问层，其中包含基于IProjectRepository NHibernate的实现.它引用 Foo.Bar ，并包含诸如 Project.hbm.xml 之类的映射文件.

I also have an assembly Foo.Bar.Data that acts as my NHinbernate data access layer wich holds the IProjectRepository NHibernate-based implementation. It references Foo.Bar and contains the mapping files such as Project.hbm.xml.

<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="Foo.Bar"
                   namespace="Foo.Bar.Domain" default-lazy="false">
  <class name="Project">
    <id name="Id" column="ID" />
    <property name="Customer" column="CUSTOMER" />
  </class>
</hibernate-mapping>

不幸的是，使用此设置，我得到以下异常:

Unfortunately with this setup I get the following exception:

NHibernate.MappingException:无持久性:Foo.Bar.Domain.Project

NHibernate日志显示:

And the NHibernate log says:

WARN NHibernate.Cfg.Configuration(空)-程序集中未找到映射的文档:Foo.Bar，版本= 1.0.0.0，区域性=中性，PublicKeyToken =空

但是，如果我将映射文件添加到 Foo.Bar ，则一切正常.但是我真的不希望任何数据访问或NHinbernate实现细节进入我的域程序集.这往往是最好的做法，对吗?这种设置不是一个好方法吗?

Howver if I add the mapping file to the Foo.Bar assmbly everything works fine. But I really do not want any data access or NHinbernate implementation details into my domain assembly. This tends to be best practise, right? Is this kind of setup not a good way to go?

如何让NHibernate在 Foo.Bar.Data *程序集中找到映射文件?

How can I make NHibernate find the mapping files in the Foo.Bar.Data* assembly?

推荐答案

原来，我要做的就是添加

Turns out that all I have to do is add

<mapping assembly="Foo.Bar.Data"/> 

在<session-factory>元素中的隐藏配置.

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