c# - Automapper AssertConfigurationIsValid 不检查 ReverseMap

Question

当我创建映射 1->2 然后反转它时，我希望得到与映射 2->1 和反转相同的结果。正确的？但是AssertConfigurationIsValid一种情况成功，另一种情况失败。

例如，

public class Basic1
{
    public string Name;
    public int Age;
}

public class Basic2
{
    public string Name;
}


public void TestAutoMapperBasic()
{
    Mapper.Initialize(cfg =>
    {
        cfg.CreateMap<Basic1, Basic2>()
            .ForMember(dest => dest.Name, c => c.MapFrom(src => src.Name))
            .ReverseMap();
    });
    Mapper.AssertConfigurationIsValid();
}

这会成功吗？!!!但如果我把它倒过来，就是CreateMap<Basic2, Basic1>那么它将失败。

我要AssertConfigurationIsValid实际检查两个方向，而不仅仅是一个方向。我该怎么做？

Answer 1

这是预期的行为，因为 described here由开发者提供。

Ah, this is the expected behavior. ReverseMap is different, itassumes you're literally flattening and un-flattening. Forun-flattening, you'd want to assert that the source side is allmapped, not the destination. Reverse map doesn't assume you want toassert anything, since you've already validated the Source ->Destination mapping.

In short, ReverseMap is now "special" and not merely a short cut fortwo CreateMap calls.

如果你想指定反向映射也应该验证，你可以这样明确指定:

config.ReverseMap().ValidateMemberList(MemberList.Destination)

您还可以创建一个扩展方法作为此的快捷方式:

public static IMappingExpression<TDestination, TSource> ReverseMapWithValidation<TSource, TDestination>(this IMappingExpression<TSource, TDestination> mapping)
    => mapping.ReverseMap().ValidateMemberList(MemberList.Destination);