Automapper - Map list of objects to single complex type with nested objects

Question

I am using an Automapper and I need to map a list of objects to a single complex type, which has a lot of nested objects, but I can't find what may be the right way to do that. Of course I have a lot more concrete objects, but I'm just simplifying my situation.

Source:

public abstract class SourceBase 
{
    public int? Value { get; set; }
}

public class Source1 : SourceBase
{
}

public class Source2 : SourceBase
{
}

Destination:

public abstract class DestBase 
{
    public int? Value { get; set; }
}

public class Dest1 : DestBase
{
}

public class Dest2 : DestBase
{
}

I have this response from the service:

public List<SourceBase> Foo { get; set; }

And I want to map it into this object:

public class DestObj 
{
    public Dest1 Dest1Obj { get; set; }
    public Dest2 Dest2Obj { get; set; }
}

Thank you!

Why though? You get a list of SourceBase? Why not map it to a list of DestBase? — panoskarajohn
– panoskarajohn, Commented Jan 7, 2020 at 9:30

DeividasB · Accepted Answer · 2020-01-07 09:49:59Z

1

Basically I've written a custom mapper with Linq.

CreateMap<List<SourceBase>, DestObj>()
    .ForMember(dest => dest.Dest1Obj, opt => opt.MapFrom(src => src.Single(x => x.GetType() == typeof(Source1))))
    .ForMember(dest => dest.Dest2Obj, opt => opt.MapFrom(src => src.Single(x => x.GetType() == typeof(Source2))));

CreateMap<Source1, Dest1>();
CreateMap<Source2, Dest2>();

answered Jan 7, 2020 at 9:49

DeividasB

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