我找不到正确扩展ASP.NET Core的IdentityUser
的方法(扩展后为ApplicationUser
)。我可以覆盖它并从其他模型链接它,但是不能从用户链接到其他模型。像CustomTag
这样的简单数据就可以使用。
问题的源代码:https://github.com/chanibal/CoreIdentityIssue
或者,具体来说,it's second commit that contains all the changes over the default template
我做了什么:
更改了覆盖IdentityUser
的模型(如official docs):
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
: base(options)
{}
public DbSet<Bar> Bars { get; set; }
public DbSet<Foo> Foos { get; set; }
public DbSet<ApplicationUser> ApplicationUsers { get; set; } //< doesn't help
}
public class ApplicationUser : IdentityUser
{
public string CustomTag { get; set; } //< this works
public Bar Bar { get; set; } //< THIS DOES NOT WORK
}
public class Bar
{
public int Id { get; set; }
public int Value { get; set; }
}
public class Foo
{
public int Id { get; set; }
public ApplicationUser User { get; set; } //< this works
}
并迁移了更改
我通过以下方式更新Bar值:
/// This should ensure a Bar is connected to a ApplicationUser
/// and increment it's value
[Authorize]
public async Task<IActionResult> IncrementBar()
{
// This DOES NOT work
var user = await _userManager.GetUserAsync(HttpContext.User);
if (user.Bar == null) //< this is always null
{
user.Bar = new Bar() { Value = 0 };
// _context.Add(user.Bar); //< doesn't help
}
user.Bar.Value++;
// await _userManager.UpdateAsync(user); //<> doesn't help
// await _signInManager.RefreshSignInAsync(user); //< doesn't help, starting to get desperate
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
信息在数据库中,可以通过SQL访问。
但是不知何故,它不会使ApplicationUser
模型充满水气:
使用Visual Studio 16.3.9
答案 0 :(得分:2)
EF不会自动加载相关实体。您必须热切或显式加载关系。优先加载是首选方法,因为它确实会合并在一起以在单个查询中获取所有数据。但是,UserManager<TUser>
无法提供热切的加载关系。因此,您有两种选择:
显式加载关系。不过,这将需要一个额外的查询。
var user = await _userManager.GetUserAsync(HttpContext.User);
await _context.Entry(user).Reference(x => x.Bar).LoadAsync();
// note: for collection props, you'd use `Collection(x => x.CollectionProp).LoadAsync()` instead.
通过用户ID从上下文中查询用户,而不使用UserManager<TUser>
:
var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
var user = await _context.Users.Include(x => x.Bar).SingleOrDefaultAsync(x => x.Id == userId);