Is it possible to map from multiple sources?

[wbuck]

Is it possible to map from multiple source objects?

record Target
{
    public required string Name { get; init; }
    public required string Phone { get; init; }
}

class Source1
{
    public string Name { get; set; }
}

class Source2
{
    public string Phone { get; set; }
}

public static partial Target Map(Source1 s1, Source2 s2);

I presume no as I'm not sure how that would work.

[TimothyMakkison]

Hey, thanks for your question. While Mapperly doesn't explicitly support multiple source mapping, it is possible to implement this.

Instead you could try chaining together two existing target mappers like so:

[Mapper]
public static partial class Mapper
{
    private static partial Target MapSource1(Source1 src);

    private static partial void MapSource2(Source2 src, Target trg);

    public static Target Combine(Source1 src1, Source2 src2)
    {
        var target = MapSource1(src1);
        MapSource2(src2, target);
        return target;
    }
}

It's a bit verbose and won't work with init/required properties but it should work.

Hope this helps 😄

When #622 or #587 are added rhis will be a lot easier.