为什么在尝试创建用户时出现“无效对象名”错误

Question

我有下面的代码，试图通过新的asp.net Identity 2.0创建一个默认用户，如果在我的web应用程序首次运行时该用户实际上还不存在：

public class DotNetIdentity 
{
    // PROPERTIES
    public UserManager<ApplicationUser, string> UserManager { get; private set; }
    public RoleManager<IdentityRole> RoleManagement { get; private set; }
    // CONSTRUCTORS
    public DotNetIdentity()
    {
        // create the user manager
        UserManager = new UserManager<ApplicationUser, string>(new UserStore<ApplicationUser, CustomRole, string, CustomUserLogin, CustomUserRole,
    CustomUserClaim>(
            new myDbContext()));
        #region Define user manager settings
        // Configure validation logic for usernames
        UserManager.UserValidator = new UserValidator<ApplicationUser, string>
            (
            UserManager)
                                    {
                                        AllowOnlyAlphanumericUserNames = false,
                                        RequireUniqueEmail = true
                                    };
        // Configure validation logic for passwords
        UserManager.PasswordValidator = new PasswordValidator()
                                        {
                                            RequiredLength = 6,
                                            RequireNonLetterOrDigit = false,
                                            RequireDigit = false,
                                            RequireLowercase = false,
                                            RequireUppercase = false
                                        };
        // Configure user lockout defaults
        UserManager.UserLockoutEnabledByDefault = true;
        UserManager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5);
        UserManager.MaxFailedAccessAttemptsBeforeLockout = 15;
        // Register two factor authentication providers.
        UserManager.RegisterTwoFactorProvider
            ("PhoneCode", new PhoneNumberTokenProvider<ApplicationUser, string>()
                          {
                              MessageFormat = "Your security code is: {0}"
                          });
        UserManager.RegisterTwoFactorProvider
            ("EmailCode", new EmailTokenProvider<ApplicationUser, string>()
                          {
                              Subject = "SecurityCode",
                              BodyFormat = "Your security code is {0}"
                          });
        UserManager.EmailService = new EmailService();
        UserManager.SmsService = new SmsService();

        #endregion
        // create the role manager
        RoleManagement = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(
            new myDbContext()));
    }
    public void CreateDefaultAdministrator()
    {
        // db connection
        using (var db = new myDbContext())
        {
            // create admin obj
            var admin = new ApplicationUser()
            {
                Id = Guid.NewGuid().ToString(),
                UserName = "Dev",
                Email = "[e-mail]",
                IsActive = true
            };

            // create user
            var result = UserManager.Create(admin, "Blahblah*0");
            // check if role exist
            if (!RoleManagement.RoleExists("Administrator"))
            {
                // Add Administrator Role
                var createResult = RoleManagement.Create(
                    new IdentityRole("Administrator"));
            }
            if (!RoleManagement.RoleExists("Developer"))
            {
                // Add Developer Role
                var createResult = RoleManagement.Create(
                    new IdentityRole("Developer"));
            }
            // add user to roles
            var createdUser = UserManager.FindByName("Dev");
            if (createdUser != null)
            {
                UserManager.AddToRole(createdUser.Id, "Administrator");
                UserManager.AddToRole(createdUser.Id, "Developer");
            }
        }
    }
}

当上面的代码运行时，我得到错误无效的对象名称"dbo.ApplicationUsers"。代码正在通信的数据库是空的，所以我希望此代码生成所需的表。我在asp.net Identity 1.0中有类似的代码，它运行得很好。我遗漏了什么，或者可能是什么原因导致了这个错误。以下是ApplicationUser和相关类的代码：

public class CustomRole : IdentityRole<string, CustomUserRole>
{
public CustomRole() { }
    public CustomRole(string name)
    {
        Id = Guid.NewGuid().ToString();
        Name = name;
    }
}
public class CustomUserRole : IdentityUserRole<string>
{
    public string Id { get; set; }
    public CustomUserRole()
    {
        Id = Guid.NewGuid().ToString();
    }
}
public class CustomUserClaim : IdentityUserClaim<string> { }
public class CustomUserLogin : IdentityUserLogin<string>
{
    public string Id { get; set; }
    public CustomUserLogin()
    {
        Id = Guid.NewGuid().ToString();
    }
}
// define the application user
public class ApplicationUser : IdentityUser<string, CustomUserLogin, CustomUserRole, 
    CustomUserClaim>
{
    [Required]
    public bool IsActive { get; set; }
    public ApplicationUser()
    {
    }
    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser, string> manager)
    {
        // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        // Add custom user claims here
        return userIdentity;

    }
}
public partial class myDbContext : IdentityDbContext<ApplicationUser, CustomRole, string, 
    CustomUserLogin, CustomUserRole, CustomUserClaim>
{
    static myDbContext()
    {
        Database.SetInitializer<myDbContext>(null);
    }
    public myDbContext()
        : base("Name=myDbContext")
    {
    }
    public DbSet<TestTable> TestTables { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Configurations.Add(new TestTableMap());
    }
}
}

Answer 1

我不得不为我的项目启用迁移。这为我解决了问题。我用这篇文章来帮助我。http://www.dotnet-tricks.com/Tutorial/entityframework/R54K181213-Understanding-Entity-Framework-Code-First-Migrations.html