mapping two source props to one target prop

[senal]

Hi,

I have a requirement to bind/join two source property values to one target property.

source

 public class Car 
 {
     public string Brand {get; set;}
     public string Model {get; set;}
 }

target

 public class CarDto 
 {
     public string Make {get; set;}
 }

I need to join the value of Brand and Model properties of the Car object to Make property of CarDto

Appreciate your help.

[TimothyMakkison]

Hey, thanks for using Mapperly. It looks like before/after mapping could work.

[Mapper]
public static partial class Mapper
{
    // tell mapperly it doesn't need to resolve Make, we will do it ourselves
    [MapperIgnoreTarget(nameof(CarDto.Make))]
    private static partial CarDto InternalMapCarToDto(Car car);

    public static CarDto MapCarToDto(Car car)
    {
        var target = InternalMapCarToDto(car);
        target.Make = $"Merged {car.Brand} + {car.Model}";
        return target;
    }
}

[senal]

Thanks @TimothyMakkison ,
But I'm getting this error. Any thoughts?

My implementation is as below:

 [Mapper]
 public static partial class CarMapper
 {
     [MapperIgnoreTarget(nameof(CarDto.Make))]
     private static partial CarDto InternalMapDtoToCar(Car car);

     public static CarDto MapCarToDto(Car car)
     {
        var target = MapCarToDto(car);
        target.Make = $"{car.Brand} {car.Model}";
        return target;
     }
 }

[senal]

@TimothyMakkison ,

I think

var target = MapCarToDto(car);

has to change as below

var target = InternalMapDtoToCar(car);

That fix the exception.

[TimothyMakkison]

Oh yeah my bad. I wasn't using an ide so I didnt catch that. Sorry 🙏