Farther extending ApplicationUser class in ASP.NET MVC5 Identity system

Question

I'm creating a simple application for university where a student can make some type of request which is then processed by an employee of particular speciality.

I would like to use default MVC5 identity system and to extend the ApplicationUser class using TPH pattern. So I added the common properties to the ApplicationUser:

public class ApplicationUser : IdentityUser
    {
        [Required]
        public string FirstName { get; set; }
        [Required]
        public string LastName { get; set; }
        [Required]
        public string Email { get; set; }
    }

then I created two classes which inherits the ApplicationUser:

public class Student : ApplicationUser
    {
        public string PersonalNumber { get; set; }
        public bool Monitor { get; set; }
        public virtual Group Group { get; set; }
        public virtual ICollection<Request> Requests { get; set; }
    }

public class Employee : ApplicationUser
    {
        public virtual EmployeeSpeciality EmployeeSpeciality { get; set; }
        public virtual ICollection<Request> Requests { get; set; }
    }

what I currently want is to make both types of users register as a base Identity and to keep both in a single table as in the inheritance example on asp.net

As I thought, it would be enough to initialize user var in AccountController which is then passes to the UserManager as a Student or as an Employee. But after trying to register as a Student i'm getting this exception:

Exception Details: System.Data.SqlClient.SqlException: Invalid column name 'PersonalNumber'.
Invalid column name 'Monitor'.
Invalid column name 'EmployeeSpeciality_Id'.
Invalid column name 'Group_Id'.

My context class:

public class EntityContext : IdentityDbContext
    {
        public EntityContext()
            : base("DbConnection")
        {
        }

        public DbSet<ApplicationUser> ApplicationUsers { get; set; }
        public DbSet<Student> Students { get; set; }
        public DbSet<Employee> Employees { get; set; }
        ...
    }

and a part of controller's action:

public async Task<ActionResult> Register(RegisterViewModel model)
    {
        if (ModelState.IsValid)
        {
            var user = new Student()
            {
                UserName = model.UserName,
                FirstName = model.FirstName,
                LastName = model.LastName,
                Email = model.Email
            };
            var result = await UserManager.CreateAsync(user, model.Password);

I tried setting ApplicationClass to an abstract class, but no luck. Any help would be appreciated.

UPDATE: The problem wasn't in the code itself. I simply haven't dropped (or updated) the database after making these changes to the model. After it everything works just fine.

Answer 1

@Dragonheart: I tried this repro and it would work fine if you remove the DBSet declarations in you context class. The IdentityDbContext would handle you TPH pattern and add a Discriminator column in the table to differentiate the child classes.