NHibernate:如何在运行时重新配置映射?

Let's get this out of the way first: I know that SessionFactory is immutable - I'm trying to change the Configuration at runtime and regenerate ISessionFactory.

让我们先解决这个问题:我知道SessionFactory是不可变的——我试图在运行时更改配置并重新生成ISessionFactory。

Specifically, I have a Customer mapped that will have some fields added to its dynamic-component node at runtime. I would like to do something like this

具体地说，我有一个客户映射，它将在运行时将一些字段添加到其动态组件节点。我想做这样的事

var newSessionFactory = previousConfiguration
  .RemoveClassMapping(typeof(Customer))
  .AddXmlString(newMappingForCustomer)
  .BuildSessionFactory();

However, I don't see any obvious way to remove a mapping, is there anything I can do short of regenerating the entire Configuration?

但是，我看不到任何明显的删除映射的方法，除了重新生成整个配置之外，我还能做什么吗?

1 个解决方案

#1

It's not possible. You'll have to regenerate the Configuration.

这是不可能的。您必须重新生成配置。

My initial suggestion would be that you choose a different strategy for your model.

我最初的建议是你为你的模型选择一个不同的策略。

However, if you are determined to go with this :-), you can:

但是，如果您决定采用以下方法:-)，您可以:

Create a "partial" Configuration (that does not include Customer)
创建“部分”配置(不包括客户)
Serialize it to a MemoryStream
将它序列化为MemoryStream
Add the "base" Customer mapping, if needed
如果需要，添加“基本”客户映射
Create the temporary SessionFactory
创建的临时SessionFactory
Retrieve whatever information you need to map Customer
检索您需要映射客户的任何信息
Deserialize your saved Configuration
反序列化保存的配置
Add the Customer mapping and create your final SessionFactory
添加客户映射并创建最终的SessionFactory

#1