CODEWITHSUNDEEP
c#mappingautomapperautomapper-3
Lorenzo
Lorenzo

Reputation: 29427

AutoMapper inheritance error

I have the following abstract classes

public abstract class BaseClass
{
    public int NumberProperty { get; set; }
}

public abstract class BaseClass_DTO
{
    public int NumberProperty { get; set; }
    public string NumberPropertyAsString { get; set; }
}

and the following concrete class 

public class ConcreteA : BaseClass
{
    public string StringProperty { get; set; }
}

public class ConcreteA_DTO : BaseClass_DTO
{
    public string StringProperty { get; set; }
}

And this is the Map

Mapper.Initialize( cfg => {
    cfg.CreateMap<BaseClass, BaseClass_DTO>()
        .ForMember( p => p.NumberPropertyAsString, opt => opt.MapFrom( x => x.NumberProperty.ToString() ) );
    cfg.CreateMap<ConcreteA, ConcreteA_DTO>()
        .IncludeBase<BaseClass, BaseClass_DTO>()
        .ReverseMap();
} );
Mapper.AssertConfigurationIsValid();

The code says that the configuration is not valid because of 

Unmapped members were found. Review the types and members below.
Add a custom mapping expression, ignore, add a custom resolver, or modify the source/destination type
=============================================================================
ConcreteA_DTO -> ConcreteA (Source member list)
Temporary.Test.ConcreteA_DTO -> Temporary.Test.ConcreteA (Source member list)

Unmapped properties:
NumberPropertyAsString

The error happens because of the ReverseMap() call. How do I set the reverse map to ignore the member without duplicating the Map?

Upvotes: 1

Views: 691

Answers (1)

Alex
Alex

Reputation: 13234

You will need to ignore the NumberPropertyAsString in the reverse map using

.ReverseMap()
   .ForSourceMember(p => p.NumberPropertyAsString, opt => opt.Ignore());

It appears that in your specific mapping config, you should make the configuration both in the base and the concrete as well.

1. In the base class map.

cfg.CreateMap<BaseClass, BaseClass_DTO>()
    .ForMember(p => p.NumberPropertyAsString, opt => opt.MapFrom(x => x.NumberProperty.ToString()))
    .ReverseMap()
          .ForSourceMember(p => p.NumberPropertyAsString, opt => opt.Ignore());

2. In the concrete class map.

cfg.CreateMap<ConcreteA, ConcreteA_DTO>()
    .IncludeBase<BaseClass, BaseClass_DTO>()
    .ReverseMap()
         .ForSourceMember(p => p.NumberPropertyAsString, opt => opt.Ignore());

Upvotes: 1

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