AutoMapper Map Child Property that also has a map defined

Question

I have the following Domain Object:

public class DomainClass

{

    public int Id { get; set; }



    public string A { get; set; }

    public string B { get; set; }

}

I have the following two objects that I want to map to:

public class Parent 

{

    public int Id { get; set; }

    public string A { get; set; }



    public Child Child { get; set; }

}



public class Child 

{

    public int Id { get; set; }

    public string B { get; set; }

}

I set up the following maps:

 Mapper.CreateMap<DomainClass, Parent>();

 Mapper.CreateMap<DomainClass, Child>();

If I map my object using the following call then the parent.Child property is null.

var domain = GetDomainObject();

var parent = Mapper.Map<DomainClass, Parent>(domain); // parent.Child is null

I know I can write the following:

var domain = GetDomainObject();

var parent = Mapper.Map<DomainClass, Parent>(domain);

parent.Child = Mapper.Map<DomainClass, Child>(domain);

Is there a way I can eliminate that second call and have AutoMapper do this for me?

Answer 1

You just need to specify that in the mapping:

Mapper.CreateMap<DomainClass, Child>();
Mapper.CreateMap<DomainClass, Parent>()
      .ForMember(d => d.Id, opt => opt.MapFrom(s => s.Id))
      .ForMember(d => d.A, opt => opt.MapFrom(s => s.A))
      .ForMember(d => d.Child, 
                 opt => opt.MapFrom(s => Mapper.Map<DomainClass, Child>(s)));

AutoMapper Map Child Property that also has a map defined

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