流利NHibernate的问题（ClassMap） [英] Fluent Nhibernate problem (ClassMap)

问题描述

我有下面的XML（.hbm）：

I have the following XML (.hbm):

<property name="Geometry" column="the_geom">
   <type name="NHibernate.Spatial.Type.GeometryType,NHibernate.Spatial">
      <param name="subtype">MULTIPOLYGON</param>
      <param name="srid">-1</param>
   </type>
</property>

使用NHibernate空间类型...

如何汇入作业我可以映射特性使用ClassMap（流利NHibernate的）？

It´s using Nhibernate Spatial type... How can I map that property using ClassMap (Fluent Nhibernate) ?

感谢

推荐答案

好吧，我'已经不使用NHibernate的空间，但我通过代码浏览，它看起来像 GeometryType 从IUserType继承，所以你应该能够与使用它。 CustomTypeIs<>

Well, I've not used NHibernate Spatial, but I browsed through the code and it looks like GeometryType inherits from IUserType so you should be able to use it with .CustomTypeIs<>

例如：

Map(x => x.Geometry, "the_geom").CustomTypeIs<GeometryType>();

除非它自动的，这可能不会让你的参数虽然元素。我不知道一个真正好的办法做到这一点，但你总是可以添加一个XML改变，像这样：

Unless it happens automagically, that probably won't get you your param elements though. I'm not sure of a truly nice way to do this but you can always add an XML alteration like so:

Map(x => x.Geometry, "the_geom").AddAlteration(p => p.AddElement("type")
    .WithAtt("name", "NHibernate.Spatial.Type.GeometryType,NHibernate.Spatial")
        .AddElement("param")
            .WithAtt("name", "subtype")
            .WithText("MULTIPOLYGON")
        .ParentNode
        .AddElement("param")
            .WithAtt("name", "srid")
            .WithText("-1")
    );

请注意，要获得 WithText 的功能，你必须添加一个扩展的XmlElement 像这样（WithAtt和的addElement都在FluentNHibernate.Mapping命名空间扩展）：

Note that to get the WithText functionality, you'll have to add an extension for XmlElement like so (WithAtt and AddElement are extensions in the FluentNHibernate.Mapping namespace):

public static class XmlExtensions
{
    public static XmlElement WithText(this XmlElement element, string text)
    {
        element.InnerText = text;
        return element;
    }
}

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