我怎样才能在NHibernate中映射一个可为空的枚举？ [英] How can I map a nullable enum in NHibernate?

问题描述

我已经无法使用NHibernate和Fluent NHibernate配置持久化可枚举的枚举。 NHibernate尝试保存枚举的字符串表示，并得到错误

$ p $ System.Data.SqlClient.SqlException：转换失败时将
nvarchar值VGS转换为数据类型tinyint。

该属性被定义为

 公共虚拟CostContributor？ ReplacementContributor {get;私人设置} 
  

和映射是

  Map（x => x.ReplacementContributor）.CustomTypeIs（typeof（CostContributor？））; 
  

我已经尝试了CustomTypeIs和CustomSqlTypeIs的所有组合，包括替换int？或字节？为CostContributor？，但没有任何工作。它可以正常工作，如果我把它作为一个非空类型。

是否有可能在NHibernate中映射一个可为空的枚举？或者这是NHibernate中的一个错误或不支持的功能？

如果我不能做这个工作，我会添加一个未定义的值到我的枚举作为解决方法。

解决方案

这是 bug已被修正。

I have been unable to persist a nullable enum using NHibernate with Fluent NHibernate configuration. NHibernate attempts to save a string representation of the enum and I get the error

System.Data.SqlClient.SqlException: Conversion failed when converting the 
nvarchar value 'VGS' to data type tinyint.

The property is defined as

public virtual CostContributor? ReplacementContributor { get; private set; }

and the mapping is

Map(x => x.ReplacementContributor).CustomTypeIs(typeof(CostContributor?));

I've tried every combination of CustomTypeIs and CustomSqlTypeIs, including substituting int? or byte? for CostContributor?, but nothing has worked. It works fine if I make it a non-nullable type.

Is it possible to map a nullable enum in NHibernate? Or is this a bug or unsupported feature in NHibernate?

If I can't make this work I'm going to add an Undefined value to my enum as a workaround.

解决方案

This was a bug and it's been fixed.

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