Using nested mapping in automapper

2021-02-20 10:26 Bail P imported from Stackoverflow

I am trying to configure Automapper so that it automatically maps an object to another object type when mapping the object it's contained in.

I have an event entity:

 public class Event {

   public int Id { get; set; }     

   public String Name { get; set; }

   public AppUser Creator { get; set; }

   public Photo MainPhoto { get; set; }

}

This is the AppUser Entity:

public class AppUser
    {
        public int Id { get; set; }

        public string UserName { get; set; }

        public string Name { get; set; }

    }

This is the Photo entity:

public class Photo
    {

        public int Id { get; set; }
        
        public string publicId { get; set; }

        public string Url { get; set; }


    }

I have this CreateEvent method in one of my controllers which handles the creation of the event and adds it to my sql lite database:

[HttpPost]

   public async Task<ActionResult<EventDto>> CreateEvent(EventDto newEvent)
    {
    
     var createdEvent = _mapper.Map<EventDto, Event>(newEvent);
    
     await _eventsRepository.CreateEvent(createdEvent);
    
     return newEvent;
    
    }

This is the EventDto:

 public class EventDto
    {
        public int Id { get; set; }

        public string Name { get; set; }

        public PhotoDto MainPhoto { get; set; }

        public MemberDto Creator { get; set; }
        
    }

This is the Automapper config class I have:

public class AutoMapperProfile : Profile
    {
        public AutoMapperProfile() {
            CreateMap<AppUser, MemberDto>();

            CreateMap<MemberDto, AppUser>();

            CreateMap<Photo, PhotoDto>();

            CreateMap<PhotoDto, Photo>();

            CreateMap<Event, EventDto>();

            CreateMap<EventDto, Event>();
            
        }
    }

So when the EventDto is converted to the Event entity here (see above in the CreateEvent method) :

var createdEvent = _mapper.Map<EventDto, Event>(newEvent);

I want the 'PhotoDto' to automatically convert into a 'Photo' object and the 'memberDto' to automatically convert into an 'AppUser'.

Is there anyway to achieve this with Automapper?

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