[英]UserManager.FindByEmailAsync returns null, but the user exists in the database
UserManager.FindByEmailAsync
返回null
,但该用户存在于数据库中。
下面的代码解释了这个奇怪的问题:
var email = info.Principal.FindFirstValue(ClaimTypes.Email);
var test = new Data.ApplicationDbContext().Users.First(x => x.NormalizedEmail == email);
var usermail = await _userManager.FindByEmailAsync(email);
Console.WriteLine(test == null); //false
Console.WriteLine(usermail == null); //true
同样通过_userManager
本身,可以获得所需的用户:
var test = _userManager.Users.FirstOrDefault(x => x.NormalizedEmail == email);
var usermail = await _userManager.FindByEmailAsync(email);
Console.WriteLine(test == null); //false
Console.WriteLine(usermail == null); //true
应该注意的是,用户不是以“传统”方式创建的,而是由 Data-Seed(在OnModelCreating
)创建的:
protected override void OnModelCreating(ModelBuilder builder)
{
var users = new (string email, string name)[] {
("xyz@gmail.com", "admin")
};
var appUsers = users.Select(x => new ApplicationUser
{
Email = x.email,
NormalizedEmail = x.email,
NormalizedUserName = x.email,
UserName = x.email,
EmailConfirmed = true,
Id = Guid.NewGuid().ToString(),
SecurityStamp = Guid.NewGuid().ToString()
}).ToArray();
var role = new IdentityRole("Admins") { Id = Guid.NewGuid().ToString() };
var roleToUser = appUsers.Select(x => new IdentityUserRole<string> { RoleId = role.Id, UserId = x.Id });
builder.Entity<ApplicationUser>().HasData(appUsers);
builder.Entity<IdentityRole>().HasData(role);
builder.Entity<IdentityUserRole<string>>().HasData(roleToUser);
base.OnModelCreating(builder);
}
正如您在我对您的 OP FindByEmailAsync所做的评论中的源代码链接中看到的那样,它在实际开始搜索用户之前执行了NormalizeKey 。
email = NormalizeKey(email);
此NormalizeKey(email)
由UpperInvariantLookupNormalizer完成,它将对您的电子邮件执行以下字符串操作
return key.Normalize().ToUpperInvariant();
现在,导致“奇怪”行为的代码部分是在创建用户时缺少对代码中的 normalize 调用:
var appUsers = users.Select(x => new ApplicationUser
{
Email = x.email,
NormalizedEmail = x.email,
NormalizedUserName = x.email,
UserName = x.email,
EmailConfirmed = true,
Id = Guid.NewGuid().ToString(),
SecurityStamp = Guid.NewGuid().ToString()
}).ToArray();
不规范化电子邮件仍然可以通过 users 表发现它,因为这只是将NormalizedEmail
(您在创建用户时没有规范化)与您作为参数传递的非规范化电子邮件进行比较:
_userManager.Users.FirstOrDefault(x => x.NormalizedEmail == email);
...但是, userManager.FindByEmailAsync
将首先userManager.FindByEmailAsync
进行规范化, 然后再进行搜索...
_userManager.FindByEmailAsync(email);
...因此找不到用户。
将您的代码更改为以下内容:
// inject via using Microsoft.AspNetCore.Identity
protected ILookupNormalizer normalizer;
var appUsers = users.Select(x => new ApplicationUser
{
Email = x.email,
NormalizedEmail = normalizer.Normalize(x.email),
NormalizedUserName = normalizer.Normalize(x.email),
UserName = x.email,
EmailConfirmed = true,
Id = Guid.NewGuid().ToString(),
SecurityStamp = Guid.NewGuid().ToString()
}).ToArray();
对于NormalizedEmail
和NormalizedUserName
,它应该是大写字母。
尝试
var appUsers = users.Select(x => new ApplicationUser
{
Email = x.email,
NormalizedEmail = x.email.ToUpper(),
NormalizedUserName = x.email.ToUpper(),
UserName = x.email,
EmailConfirmed = true,
Id = Guid.NewGuid().ToString(),
SecurityStamp = Guid.NewGuid().ToString()
}).ToArray();
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