Question

我有一个.NET Core 2.0 Web API。我正在使用Jwt身份验证。

每当应用程序到达此行时，都会抛出异常：

public async Task Seed()
{
  var adminUserJ = await _userManager.FindByNameAsync("Ciwan");
  var regularUser = await _userManager.FindByNameAsync("John");

  if (adminUserJ == null)
  {
    if (!await _roleManager.RoleExistsAsync("Admin"))
    {
      var role = new IdentityRole("Admin");
      role.Claims.Add(new IdentityRoleClaim<string> { ClaimType = "IsAdmin", ClaimValue = "True" });
      await _roleManager.CreateAsync(role);
    }

    adminUserJ = new BbUser
    {
      UserName = "Ciwan",
      Email = "ck83s9@gmail.com"
    };

    var userResult = await _userManager.CreateAsync(adminUserJ, "Welcome123");
    var roleResult = await _userManager.AddToRoleAsync(adminUserJ, "Admin");
    var claimResult = await _userManager.AddClaimAsync(adminUserJ, new Claim("Points", "10"));

    if (!userResult.Succeeded || !roleResult.Succeeded || !claimResult.Succeeded)
    {
      throw new InvalidOperationException("Failed to build user and roles");
    }
  }

  if (regularUser == null)
  {
    if (!await _roleManager.RoleExistsAsync("Regular"))
    {
      var role = new IdentityRole("Regular");
      role.Claims.Add(new IdentityRoleClaim<string> { ClaimType = "IsRegular", ClaimValue = "True" });
      await _roleManager.CreateAsync(role);
    }

    regularUser = new BbUser
    {
      UserName = "John",
      Email = "j.watson@world.com"
    };

    var userResult = await _userManager.CreateAsync(regularUser, "BigWow321");
    var roleResult = await _userManager.AddToRoleAsync(regularUser, "Regular");
    var claimResult = await _userManager.AddClaimAsync(regularUser, new Claim("Points", "10"));

    if (!userResult.Succeeded || !roleResult.Succeeded || !claimResult.Succeeded)
    {
      throw new InvalidOperationException("Failed to build user and roles");
    }
  }

  _context.AddRange(GetListOfArtists(adminUserJ.Id, regularUser.Id));
  await _context.SaveChangesAsync();
}

例外是：

System.InvalidOperationException ：序列包含多个匹配元素

奇怪的是，之前没有发生这种情况，当我从1.1升级到.NET Core 2.0时，它开始发生。

数据库的种子方法如下：

AspNetUserClaims

我看不出有什么不对。我试着查看数据库中的[HttpPost("auth/token")] public async Task<IActionResult> CreateToken([FromBody] CredentialsDto credentials) { try { var user = await _userManager.FindByNameAsync(credentials.Username); if (user != null) { if (IsUserPasswordValid(credentials, user)) { var claims = await GetClaimsAsync(user); var token = CreateNewJwtToken(claims); return Ok(new { token = new JwtSecurityTokenHandler().WriteToken(token), expiration = token.ValidTo }); } } } catch (Exception exception) { Console.WriteLine(exception); throw; } return BadRequest("Failed to generate token!"); } private async Task<IEnumerable<Claim>> GetClaimsAsync(BbUser user) { var userClaims = await _userManager.GetClaimsAsync(user); return new[] { new Claim(JwtRegisteredClaimNames.Sub, user.UserName), new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()) }.Union(userClaims); }表，但一切似乎都没问题。我有2个声明，每个用户一个。

当我尝试登录用户时会发生此错误，因此请求到达此处：

{{1}}

GetClaimsAsync（user）throws Sequence包含多个匹配元素

0 个答案: