Is it possible to call Mapper.Map inside AfterMap?

Question

Is something like this allowed somehow?

CreateMap<UserViewModel, User>()
    .ForMember(u => u.Password, o => o.Ignore())
    .AfterMap((src, dest) => {
        ...
        var entity = Mapper.Map<Entity>(src.SomeProperty);
        ...
    });

Is not working for me, it says that mapping tried to use inside AfterMap doesn't exist.

Answer 1

I notice that you are using the static AutoMapper class within your mapping, but are you also using the static instance outside of your mapping and does it have a mapping configured for your Entity class?

The below works, note that the context.Mapper call ensures that the same AutoMapper instance is used for both the calling Map and subsequent AfterMap methods.

var config = new MapperConfiguration(cfg =>
{
    cfg.CreateMap<UserViewModel, User>()
       .AfterMap((source, destination, context) => 
       { 
            var entity = context.Mapper.Map<Entity>(source.SomeProperty);
       });

    cfg.CreateMap<EntityViewModel, Entity>();
});

var mapper = config.CreateMapper();

var viewModel = new UserViewModel
{
    Name = "Test User",
    SomeProperty = new EntityViewModel 
    { 
        Value = "Sub Class" 
    }
};

var user = mapper.Map<User>(viewModel);