Automapper : mapping issue with inheritance and abstract base class on collections with Entity Framework 4 Proxy Pocos

Question

I am having an issue using AutoMapper (which is an excellent technology) to map a business object to a DTO where I have inheritance off of an abstract base class within a co

Answer 1

This answer comes 'a bit' late as I've just faced the same issue with EF4 POCO proxies.

I solved it using a custom converter that calls Mapper.DynamicMap(object source) to invoke the runtime type conversion, rather than the .Include().

It works fine for me.

In your case you would define the following converter:

class PaymentConverter : ITypeConverter {
    public DtoPayment Convert( ResolutionContext context ) {
        return Mapper.DynamicMap( context.SourceValue );
    }
}

And then:

Mapper.CreateMap().ConvertUsing();
Mapper.CreateMap();
Mapper.CreateMap();