Question

I am trying to work out how to populate Foo from FooConfig:

class Bar
{
   int A;
   int B;
}

class Foo
{
   Bar BarValues;
   Bar BarErrorValues;
}

class FooConfig
{
   int A;
   int B;
   int AError;
   int BError;
}

FooConfig is essentially a flattened version of Foo.

I can populate the BarValues easily with AutoMapper (by having a map defined for FooConfig to Bar), but I am having trouble getting the BarErrorValues populated – everything I try it ends up with the A and B values in it instead of the AError and BError values.

I suspect I need to use a “transformer” or RecognizePostfixes (although this does not seem to work as I tried it).

Answer 1

I think I have found the problem. It appears that if AutoMapper finds an exact match then the name transformer is never used. Bugger 🙁 Here is the AutoMapper source code that shows it:

private static MemberInfo FindTypeMember(IEnumerable<MemberInfo> modelProperties, IEnumerable<MethodInfo> getMethods, string nameToSearch, IMappingOptions mappingOptions)
{
    MemberInfo pi = modelProperties.FirstOrDefault(prop => NameMatches(prop.Name, nameToSearch));
    if (pi != null)
        return pi;

  ...

    pi = modelProperties.FirstOrDefault(prop => NameMatches(mappingOptions.SourceMemberNameTransformer(prop.Name), nameToSearch));
    if (pi != null)
        return pi;