The problem with Include method using on Db context - Asp.Net Core - api

Question

I'v got a backend on Asp.Net Core. Structure of the database looks that:
User - the basics information about user: login, password etc.
Profile - this entity is connected to the"User" one to one relation
Profile photos- each of the users has a own collection of photos.
This entity is connected to the "Profile"
Here is the "User" entity:
public class User
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Username { get; set; }
public byte[] PasswordHash { get; set; }
public byte[] PasswordSalt { get; set; }
public Profile Profile { get; set; }
}
Then Profile:
public class Profile
{
[ForeignKey("User")]
public int Id { get; set; }
public string BannerImageUrl { get; set; }
public string ProfileImageUrl { get; set; }
public string ShortDescription { get; set; }
public string Description { get; set; }
public User User { get; set; }
public ICollection<ProfilePhotos> ProfilePhotos { get; set; }
}
And "ProfilePhotos":
public class ProfilePhotos
{
public int Id { get; set; }
public string ImageUrl { get; set; }
public int ProfileId { get; set; }
public Profile Profile { get; set; }
}
I want to get all profile photos so I created a endpoint to to that:
[HttpGet("{username}/photos")]
public IActionResult GetPhotos(string username)
{
var profilePhotos = _profileService.GetAllPhotos(username);
var model = _mapper.Map<IList<ProfilePhotosModel>>(profilePhotos);
return Ok(model);
}
To get all photos I use a method from "profileService":
public IEnumerable<ProfilePhotos> GetAllPhotos(string username)
{
return _context.ProfilePhotos.Include(a=>a.Profile).ThenInclude(b=>b.User).Where(x => x.Profile.User.Username == username);
}
On response I want to get a id of photo, photoUrl and username so I mapped my profile photos to "ProfilePhotosModel"
public class ProfilePhotosModel
{
public int Id { get; set; }
public string ImageUrl { get; set; }
public string Username { get; set; }
}
but unfortunately on response I only get Id and photoUrl. The username is null :(
What am I doing wrong?

Answer 1

You could add custom mapping for the Username property.
var config = new MapperConfiguration(cfg =>
{
cfg.CreateMap<ProfilePhotos, ProfilePhotosModel>()
.ForMember(m => m.Username, exp => exp.MapFrom(p => p.Profile.User.Username));
});