Mapping two arrays with automapper return empty array

Question

I'm trying to Map with Automapper two arrays, the soure is a poco object from EF and the destination my entity object, that's what I have done and allways return an Empty Array:

From Log[] To > Model.Log[]

   var srcLog = db.Set<Log>().Where(e => e.Id > id).Take(quantity).ToArray();
   var result = Mapper.DynamicMap<Log[], Model.Log[]>(srcLog);

EF Log object:

 public partial class Log
    {
        public long Id { get; set; }
        public string Member_Id { get; set; }
        public string Message { get; set; }
        public DateTime CreatedDate { get; set; }       
        public virtual Member Member { get; set; }
    }

Model.Log[] object:

 public class Log
    {
        public long Id { get; set; } 
        public string Message { get; set; }
        public DateTime CreatedDate { get; set; }
        public Member Member { get; set; }
    }

no, is not empty :( I was using Mapper.Map but I had problems with the property getType(), and then I changed it to DynamicMap and works fine for one item, but with one array is not working... — user1520494, Jun 10 '14 at 06:22
What properties do you have in `Log` and `Model.Log` types? Do they match? — st4hoo, Jun 10 '14 at 06:36
@user1520494 have you seen my answer or is there a stray neutrino ? — wal, Jun 10 '14 at 07:00
Hi Wal! yes, thanks for your response I was trying to do what you said, but I'm having problems with Mapper.Map, — user1520494, Jun 10 '14 at 07:04
Yes, That's the error : http://stackoverflow.com/questions/3441916/automapper-mapping-issue-with-inheritance-and-abstract-base-class-on-collectio — user1520494, Jun 10 '14 at 07:08
Why are you using DynamicMap? This is only reserved for when you don't know the types at compile-time. — Jimmy Bogard, Jun 10 '14 at 21:48
Hi Jimmy, I'm using Dynamic Map because I had problems mapping EF poco objects to my entities — user1520494, Jun 11 '14 at 05:49

wal · Accepted Answer · 2014-06-10T06:36:53.650

Don't create a Log[] array mapping - instead just define the mapping between the 2 entities:

var srcLog = new[] {new Log {Id = 1}, new Log {Id = 2}};
Mapper.CreateMap<Log, Model.Log>();//do not map from/to an array

var result = Mapper.Map<Model.Log[]>(srcLog);
Assert.AreEqual(2, result.Length);
Assert.AreEqual(1, result[0].Id);
Assert.AreEqual(2, result[1].Id);//all green!

Doesnt appear you can use the generic or non generic DynamicMap however as you know the types at compile time you should use CreateMap anyway. see here for more details

Mapping two arrays with automapper return empty array

1 Answers1