Please help. I can not resolve the issue - the category name is null. Thanks a lot. The models public class Product { [Key] public int ProductID { get; set; } public string ProductName { get; set; } public string Description { get; set; } public double Price { get; set; }

        public int CategoryID { get; set; }
        [ForeignKey("CategoryID")]
        public virtual Category Category { get; set; }
    }




public class Category
    {
        [Key]
        public int CategoryID { get; set; }
        public string CategoryName { get; set; }
    }

` Product Controller

public async Task<IEnumerable<ProductDto>> GetProductsAsync()
{
    List<Product> products = await _db.Products
                                      .Include(u => u.Category)
                                      .ToListAsync();
    return _mapper.Map<List<ProductDto>>(products);
}



public class MappingProfiles : Profile
    {
        public MappingProfiles()
        {
            CreateMap<ProductDto, Product>().ReverseMap();
        }
    }
 public class ProductDto
    {
        public int ProductID { get; set; }
        public string ProductName { get; set; }
        public string Description { get; set; }
        public double Price { get; set; }
        public string CategoryName { get; set; }
    }

How to resolve null fields?

CodePudding user response：

Change your MappingProfiles like below:

public class MappingProfiles : Profile
{
    public MappingProfiles()
    {
        CreateMap<Product, ProductDto>()
            .ForMember(d => d.CategoryName, a => a.MapFrom(s => s.Category.CategoryName))
            .ReverseMap()
            .ForPath(b => b.Category, o => o.MapFrom(dto => (Category)null));
  
    }
}