如何使用显式成员映射为多态配置 AutoMapper?

How to configure AutoMapper for Polymorphism with explicit member mapping?(如何使用显式成员映射为多态配置 AutoMapper?)

问题描述

考虑以下基本情况:

Mapper.CreateMap<FromBase, ToBase>()
        .Include<FromD1, ToD1>()
        .Include<FromD2, ToD2>();

Mapper.CreateMap<FromD1, ToD1>()
        .ForMember( m => m.P0, a => a.MapFrom( x => x.Prop0 ) )
        .ForMember( m => m.P1, a => a.MapFrom( x => x.Prop1 ) );

Mapper.CreateMap<FromD2, ToD2>()
        .ForMember( m => m.P0, a => a.MapFrom( x => x.Prop0 ) )
        .ForMember( m => m.P2, a => a.MapFrom( x => x.Prop2 ) );

Mapper.AssertConfigurationIsValid();

FromBase[] froms = {
        new FromD1() { Prop0 = 10, Prop1 = 11 },
        new FromD2() { Prop0 = 20, Prop2 = 22 }
};

var tos = Mapper.Map<FromBase[], ToBase[]>( froms );

与:

public class FromBase {
    public int Prop0 { get; set; }
}
public class FromD1 : FromBase {
    public int Prop1 { get; set; }
}
public class FromD2 : FromBase {
    public int Prop2 { get; set; }
}

public class ToBase {
    public int P0 { get; set; }
}
public class ToD1 : ToBase {
    public int P1 { get; set; }
}
public class ToD2 : ToBase {
    public int P2 { get; set; }
}

它看起来像 Automapper 文档上的 示例.

It looks like the example on Automapper's doc.

但是 Mapper.AssertConfigurationIsValid() 断言抛出:

AutoMapperConfigurationException:以下 1 个属性ToBase 未映射:P0添加自定义映射表达式，忽略或重命名属性FromBase."

AutoMapperConfigurationException: "The following 1 properties on ToBase are not mapped: P0 Add a custom mapping expression, ignore, or rename the property on FromBase."

除非我遗漏了什么，与示例的唯一区别是我不依赖约定，使用 ForMember 手动映射属性.还有几个派生类.不知道这些会是什么问题，但我想不出别的.

Unless I am missing something, the only differences with the example it that I am not relying on conventions, mapping the properties manually with ForMember. Also there are several derived classes. Not sure how these would be a problem, but I can't think of anything else.

有什么想法吗?

推荐答案

映射实际上工作正常，虽然配置验证断言失败...

The mapping actually works fine, although the configuration validation assertion fails...

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