Unflattening with a different name

[artkolisnyk]

Hello, I have to map the following classes:

public sealed class DataObject
{
    public byte Types_ { get; init; }
    public byte Filters { get; init; }
    public byte Triggers { get; init; }
}

public sealed class DataObject2
{
    // other stuff omitted
    public required DataObjectData Data { get; set; }
}

public sealed class DataObjectData
{
    public byte Types { get; init; }
    public byte Filters { get; init; }
    public byte Triggers { get; init; }
}

I defined the following helper class to perform mapping:

[Mapper]
internal static partial class MappingExtensions
{
    [MapPropertyFromSource(nameof(DataObject2.Data))]
    [MapProperty("Types_", "Data.Types")]
    public static partial DataObject2 Map(this DataObject request);
}

Unfortunately, Types_ to Data.Types mapping does not get generated. Here is the generated code:

internal static partial class MappingExtensions
{
	[global::System.CodeDom.Compiler.GeneratedCode("Riok.Mapperly", "4.2.1.0")]
	public static partial global::Grpc.Extensions.DataObject2 Map(this global::Grpc.Extensions.DataObject request)
	{
		var target = new global::Grpc.Extensions.DataObject2()
		{
			Data = MapToDataObjectData(request),
		};
		return target;
	}
	
	[global::System.CodeDom.Compiler.GeneratedCode("Riok.Mapperly", "4.2.1.0")]
	private static global::Grpc.Extensions.DataObjectData MapToDataObjectData(global::Grpc.Extensions.DataObject source)
	{
		var target = new global::Grpc.Extensions.DataObjectData()
		{
			Filters = source.Filters,
			Triggers = source.Triggers,
		};
		return target;
	}
}

What am I doing wrong? How can I point the mapper to map Types_ from DataObject class to Types within the Data property of DataObject2?

[latonz]

You are applying the Types_ => Type mapping on the DataObject to DataObject2 mapping. But DataObject doesn't have a member named Types_. Instead you need to add another mapping method declaration (can be private) for the mapping from DataObject to DataObjectData and configure the member mapping there:

[MapProperty("Types_", "Data.Types")]
private static partial DataObject2 Map(DataObjectData src);

[artkolisnyk]

Got it, thanks.