iam trying to map just a long field coming from my url route to create a Query Object from my controller, can i use auto mapper
CreateMap(MemberList.None);
Source :-long id
Destination:-
public class GetPlanQuery : IRequest<PlanDto>
{
public long Id { get; }
public GetPlanQuery(long id)
{
Id = id;
}
internal sealed class GetPlanQueryHandler : IRequestHandler<GetPlanQuery, PlanDto>
{
//Logic will go here
}
}
Map i am using is as below
CreateMap<long, GetPlanQuery>(MemberList.None);
i am getting an exception while executing as
System.ArgumentException:
needs to have a constructor with 0 args or only optional args.'
As Lucian correctly suggested you can achieve this kind of custom mapping by implementing ITypeConverter:
public class LongToGetPlanQueryTypeConverter : ITypeConverter<long, GetPlanQuery>
{
public GetPlanQuery Convert(long source, GetPlanQuery destination, ResolutionContext context)
{
return new GetPlanQuery(source);
}
}
then specify it's usage in AutoMapper configuration:
configuration.CreateMap<long, GetPlanQuery>()
.ConvertUsing<LongToGetPlanQueryTypeConverter>();
Alternatively, you can just use a Func
:
configuration.CreateMap<long, GetPlanQuery>()
.ConvertUsing(id => new GetPlanQuery(id));