InvalidOperationException when mapping types used via .Include<>

[ccbr...@gmail.com]

I am having an issue  when using .Include<>. Here is an example:

[TestClass]

public class UnitTest1

{

static UnitTest1()

{

Mapper.Initialize(cfg =>

{

cfg.CreateMap<Base, Target>()

.Include<Derived, Target>();

});

}

[TestMethod]

public void TestMethod1()

{

var src = new Derived

{

X = 5

};

var dest = Mapper.Map<Derived, Target>(src);

Assert.AreEqual(src.X, dest.X);

}

}

class Base

{

public int X { get; set; }

}

class Derived : Base { }

class PolicyBase : Base { }

class Target

{

public int X { get; set; }

public string S { get; set; }

}

This mapping worked successfully from at least 3.3 until the 4.2.0 release.  Starting in 4.2.0 (and in 5.0.0), it gives the below exception:

Unable to create instance of class AutoMapperTest.UnitTest1. Error: System.InvalidOperationException: Missing map from Base to Target. Create using Mapper.CreateMap<Base, Target>..
    at AutoMapper.QueryableExtensions.Impl.QueryMapperHelper.MissingMapException(Type sourceType, Type destinationType)
   at AutoMapper.MapperConfiguration.<GetDerivedTypeMaps>d__89.MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)
   at AutoMapper.MapperConfiguration.Seal()
   at AutoMapper.MapperConfiguration..ctor(Action`1 configure, IEnumerable`1 mappers, IEnumerable`1 typeMapObjectMappers)
   at AutoMapperTest.UnitTest1..cctor() in C:\Development\TestApps\AutoMapperTest\AutoMapperTest\UnitTest1.cs:line 13

I also tested this using the non-static API, but didn't have any luck there either.

I can fix it by adding:

cfg.CreateMap<Derived, Target>();

at initialization, but I thought the purpose of .Include<> was to avoid that.

Any help is much appreciated!

Thanks!

Chris Bristol

[Jimmy Bogard]

No, that's not the purpose of Include. The purpose is to combine configuration of two different type maps, and inherit base map configuration to the sub map. Looks like it was working accidentally before.

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[ccbr...@gmail.com]

I was afraid you were going to say that! :)

[Jimmy Bogard]

Yeah sorry :)