枚举解析似乎不适用于 Fluent NHibernate

发布于 2024-09-09 10:04:10 字数 415 浏览 4 评论 0原文

我有一个带有名为 Salutation 的枚举的数据访问类:

 public enum Salutation
  {
    Unknown = 0,
    Dame = 1,
    etc
    Mr = 5,
    etc
  }

我正在使用 NHibernate 保留该类,直到今天早上我还在使用 .hbm.xml 文件进行映射。但是,我现在已改用 Fluent NHibernate,但加载该类的实例失败(例如):

[HibernateException: Can't Parse 5 as Salutation]

如您所见,5 应该可以解析为 Salutation(假设5是一个int,从错误消息中无法看出)。

有人知道这是怎么回事吗?

谢谢

大卫

I have a data access class with an Enum called Salutation:

 public enum Salutation
  {
    Unknown = 0,
    Dame = 1,
    etc
    Mr = 5,
    etc
  }

I am peristing the class with NHibernate, and up until this morning I was using .hbm.xml files for mapping. However, I've now switched to using Fluent NHibernate, but loading instances of the class fails with (for example):

[HibernateException: Can't Parse 5 as Salutation]

As you can see, 5 should be parseable as a Salutation (assuming 5 is an int, it's not possible to tell from the error message).

Anyone know what's going on here?

Thanks

David

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评论(3

江挽川 2024-09-16 10:04:10

这比我想象的要容易得多。

Map(x => x.WhateverThePropertyNameIs).CustomType(typeof(MyEnumeration));

This is much easier than I thought.

Map(x => x.WhateverThePropertyNameIs).CustomType(typeof(MyEnumeration));
梦开始←不甜 2024-09-16 10:04:10

另一个选项是使用 EnumConvention:

using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestApp
{
    using FluentNHibernate.Conventions;
    using FluentNHibernate.Conventions.AcceptanceCriteria;
    using FluentNHibernate.Conventions.Inspections;
    using FluentNHibernate.Conventions.Instances;

    public class EnumConvention :
        IPropertyConvention,
        IPropertyConventionAcceptance
    {
        #region IPropertyConvention Members

        public void Apply(IPropertyInstance instance)
        {
            instance.CustomType(instance.Property.PropertyType);
        }

        #endregion

        #region IPropertyConventionAcceptance Members

        public void Accept(IAcceptanceCriteria<IPropertyInspector> criteria)
        {
            criteria.Expect(x => x.Property.PropertyType.IsEnum ||
            (x.Property.PropertyType.IsGenericType &&
             x.Property.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>) &&
             x.Property.PropertyType.GetGenericArguments()[0].IsEnum)
            );
        }

        #endregion
    }
}

要使用此 enumconvention:

...
var fluentCfg = Fluently.Configure().Database(cfg).Mappings(
                    m => m.FluentMappings.AddFromAssemblyOf<SomeObjectMap>().Conventions.Add<EnumConvention>());
...

在映射文件中,

Map(x => x.SomeEnumField);

Another option is using, EnumConvention:

using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestApp
{
    using FluentNHibernate.Conventions;
    using FluentNHibernate.Conventions.AcceptanceCriteria;
    using FluentNHibernate.Conventions.Inspections;
    using FluentNHibernate.Conventions.Instances;

    public class EnumConvention :
        IPropertyConvention,
        IPropertyConventionAcceptance
    {
        #region IPropertyConvention Members

        public void Apply(IPropertyInstance instance)
        {
            instance.CustomType(instance.Property.PropertyType);
        }

        #endregion

        #region IPropertyConventionAcceptance Members

        public void Accept(IAcceptanceCriteria<IPropertyInspector> criteria)
        {
            criteria.Expect(x => x.Property.PropertyType.IsEnum ||
            (x.Property.PropertyType.IsGenericType &&
             x.Property.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>) &&
             x.Property.PropertyType.GetGenericArguments()[0].IsEnum)
            );
        }

        #endregion
    }
}

To use this enumconvention:

...
var fluentCfg = Fluently.Configure().Database(cfg).Mappings(
                    m => m.FluentMappings.AddFromAssemblyOf<SomeObjectMap>().Conventions.Add<EnumConvention>());
...

And in mapping file,

Map(x => x.SomeEnumField);
波浪屿的海角声 2024-09-16 10:04:10

由于最受接受的答案仍然因相同的错误而失败,这里是我的解决方案:

public class ConventionName : IUserTypeConvention
{
    public void Accept(IAcceptanceCriteria<IPropertyInspector> criteria)
    {
        criteria.Expect(property => property.Type == typeof(FluentNHibernate.Mapping.GenericEnumMapper<EnumNameHere>));
    }

    public void Apply(IPropertyInstance instance)
    {
        instance.CustomType<EnumNameHere>();
    }
}

Since the most accepted answer does still fail with same error, here my solution:

public class ConventionName : IUserTypeConvention
{
    public void Accept(IAcceptanceCriteria<IPropertyInspector> criteria)
    {
        criteria.Expect(property => property.Type == typeof(FluentNHibernate.Mapping.GenericEnumMapper<EnumNameHere>));
    }

    public void Apply(IPropertyInstance instance)
    {
        instance.CustomType<EnumNameHere>();
    }
}
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