Ignore Automapper property

Question

I’m using Automapper version 7. I need to ignore a property that is in the result class and has no source class. As below.

public class Contrato
{
    public string Id{get;set;}
    public string Nome {get;set;}
}

public class ContratoDto
{
    public string Id{get;set;}
    public string Nome {get;set;}
    public string Descricao{get;set;}
}

If I use Mapper as below, it gives me the error that has Uncharted Property.

CreateMap<Contrato, ContratoDto>();
var c = _contratoRepositorio.BuscarContrato(requisicao.CodigoContrato).FirstOrDefault();

Mapper.Map<Contrato, ContratoDto>(c));

Unmapped Property: Description

How can I ignore the property in Dto that does not exist and will not exist within the model?

Answer 1

You can ignore properties with .ForMember(p => p.Propriedade, x=> x.Ignore())

Thus remaining:

CreateMap<Contrato, ContratoDto>().ForMember(p => p.Descricao, x=> x.Ignore());

In an OR search I found this answer where is given a Solution via extension method, but I never got to test.

Follows the code:

public static IMappingExpression<TSource, TDestination> Ignore<TSource, TDestination>(
    this IMappingExpression<TSource, TDestination> map,
    Expression<Func<TDestination, object>> selector)
{
    map.ForMember(selector, config => config.Ignore());
    return map;
}

Mapper.CreateMap<JsonRecord, DatabaseRecord>()
        .Ignore(record => record.Field)
        .Ignore(record => record.AnotherField)
        .Ignore(record => record.Etc);