Receiving AutoMapperMappingException - asp.net

Question

Currently I'm creating a new feature. It looks simple, but I am stuck at a problem with automapping dto to another one.
I have to create a wishlist [adding /deleting items of wishlist].
All works fine, except one thing: while adding an item to the wishlist, I'm get a message like this:
"type": "AutoMapperMappingException",
"message": "Error mapping types..."
However, I can see it got inserted into the database. Also, can delete it too. I understand the problem is linked to Automapper, but I could not figure out how to map correctly.
[HttpPost]
public async Task<IActionResult> Add(WishListItemCreationDto wishListItemDto)
{
var itemAdd = _mapper.Map<WishlistItemDto>(wishListItemDto);
var itemCreated = await _wishListItemService.AddAsync(itemAdd);
return CreatedAtAction(nameof(GetId), new { id = itemCreated.Id }, wishListItemDto);
}
//service
public async Task<WishlistItemDto> AddAsync(WishlistItemDto item)
{
var entity = _mapper.Map<WishlistItem>(item);
var entityDetails = await _productDetailsRepository.GetById(item.ProductDetailId);
entity.ProductDetails = entityDetails;
await _wishListItemRepository.AddAsync(entity);
return _mapper.Map<WishlistItemDto>(entity);
}
DTOs:
public class WishListItemCreationDto
{
[Required]
public string CustomerId { get; set; }
[Required]
public int ProductDetailId { get; set; }
[Min(1)]
[Required]
public int Quantity { get; set; }
}
public class WishlistItemDto
{
public int Id { get; set; }
public string CustomerId { get; set; }
public int ProductDetailId { get; set; }
public ProductDetailsDtoWithPrimaryImage ProductDetails { get; set; }
public int Quantity { get; set; }
}
public class WishlistItem
{
public int Id { get; set; }
public string CustomerId { get; set; }
public Customer Customer { get; set; }
public int ProductDetailsId { get; set; }
public ProductDetails ProductDetails { get; set; }
public int Quantity { get; set; }
}
ProductDetails DTO:
public class ProductDetails
{
public int Id { get; set; }
public int ProductId { get; set; }
public Product Product { get; set; }
public IList<ProductAttributeValue> ProductAttributes { get; set; } = new List<ProductAttributeValue>();
public int Quantity { get; set; }
public string Sku => $"BRD{Id}";
public byte[] RowVersion { get; set; } = new byte[0];
}
public class ProductDetailsDtoWithPrimaryImage
{
public int Id { get; set; }
public int Quantity { get; set; }
public int ProductId { get; set; }
public ProductDisplayEntity Product { get; set; }
public IEnumerable<ProductAttributeWithValueDto> ProductAttributes { get; set; }
public byte[] RowVersion { get; set; }
public string Sku => $"BRD{Id}";
public int? PrimaryImageId { get; set; }
}
AutoMapper:
public WishlistItemProfile()
{
CreateMap<WishlistItem, WishListItemCreationDto>().ReverseMap();
CreateMap<WishlistItemDto, WishListItemCreationDto>().ReverseMap();
CreateMap<WishlistItem, WishlistItemDto>()
.ForMember(wi => wi.ProductDetailId, opt => opt.MapFrom(f => f.ProductDetailsId))
.ForMember(wi => wi.ProductDetails, opt => opt.MapFrom(f => f.ProductDetails))
.ReverseMap();
}

Answer 1

everything is okay, but you missed inner mapping of your classes.
What the error says:
Mapping types:
ProductDetailsDtoWithPrimaryImage -> ProductDetails
SimpleWebApi.Controllers.ProductDetailsDtoWithPrimaryImage -> SimpleWebApi.Controllers.ProductDetails
Add additional mapping in your constructor WishlistItemProfile
CreateMap<ProductDetails, ProductDetailsDtoWithPrimaryImage>().ReverseMap();
And it starts works perfect