Asp.Net IdentityUser add custom List Property - asp.net

Question

I am fairly new to coding with asp.net so there might be an obvious answere to my question but I haven't found one yet.
So currently I am developing a site for project management and I want the users to get notified when an event happens, eg. they were added to a new project, a project has been updated etc.
For that I have expanded the IdentityUser Model with a new property List
public class CojectUser : IdentityUser
{
public List<Notification> Notifications { get; set; }
}
public class Notification
{
public int NotificationID { get; set; }
public string Message { get; set; }
public bool Seen { get; set; }
}
When an event happens I add them to the user's notification list and update the user via the userManager.
public class EventBroker<T> : IEventBroker<T>
{
private readonly UserManager<CojectUser> userManager;
public EventBroker(UserManager<CojectUser> userMgr, IUserValidator<CojectUser> userValid)
{
userManager = userMgr;
}
public async Task NotifyAsync(Message<T> message, List<UserRole> recipients)
{
foreach (var user in recipients)
{
var cojectUser = await userManager.FindByNameAsync(user.Name);
if (cojectUser != null)
{
if (cojectUser.Notifications == null)
{
cojectUser.Notifications = new List<Notification>();
}
cojectUser.Notifications.Add(new Notification
{
Message = message.Information,
Seen = false
});
IdentityResult result = await userManager.UpdateAsync(cojectUser);
if (!result.Succeeded)
{
throw new UserUpdateFailException();
}
}
}
}
}
}
I am able to save the custom data to the database, but I am unable to load it again from database.
When I want to display the user's notifications userManager retrieves an user object with null as notification list. Even though the data is stored in database.
public async Task<IActionResult> Index()
{
CojectUser user = await userManager.GetUserAsync(User);
if(user.Notifications == null)
{
user.Notifications = new List<Notification>();
}
return View(user);
}
Data in database:
Can anybody tell me what I am doing wrong?

Answer 1

UserManager don't eager load properties by default.
You should use DatabaseContext directly.
var user = _context.Users.Include(c => c.Notifications).Where(u => u.Id == user.Id).ToList();