Unit of Work with Identity on ASP.NET Core

Question

I'm creating web api for a mobile application, I need when user registering add the data to database, I want to add the data to multiple tables

My User table design:

• AspnetUsers: Default identity table
• StudentUsers: The second table of user detail
• TeacherUsers: Third table for user

When on registering, user selecting which they're student or teacher. The problem here is, there is two table when registering, I want to use Unit of Work for that situation, to prevent data saving fails. If data fails not to add the data to other table.

But how can I implement this into identity?

Answer 1

You do not need to overthink/overdo Unit Of Work with Entity Framework Core.

See:

https://gunnarpeipman.com/ef-core-repository-unit-of-work/

So to get your "transaction", you will call

myInjectedContext.BeginTransaction().
/* alter any/all of the 3 DbSets */
    myInjectedContext.Commit();

where myInjectedContext is a IDataContext.

public class MyTransactionallyFriendlyDbContext : DbContext /*(, IDataContext) */
{
    public LasteDbContext(DbContextOptions<LasteDbContext> options)
        : base(options)
    {
    }
 
    public DbSet<AspnetUser> AspnetUsers { get; set; }
    public DbSet<StudentUser> StudentUsers { get; set; }
    public DbSet<TeacherUser> TeacherUsers { get; set; }
    
    private IDbContextTransaction _transaction;
 
    public void BeginTransaction()
    { 
        _transaction = Database.BeginTransaction();
    }
 
    public void Commit()
    {
        try
        {
            SaveChanges();
            _transaction.Commit();
        }
        finally
        {
            _transaction.Dispose();
        }        
    }
 
    public void Rollback()
    { 
        _transaction.Rollback();
        _transaction.Dispose();
    }
}

Here is an interface to satisfy Ioc/Unit Testing needs.

public interface IDataContext
{
    DbSet<AspnetUser> AspnetUsers { get; set; }
    DbSet<StudentUser> StudentUsers { get; set; }
    DbSet<TeacherUser> TeacherUsers { get; set; }
 
    void BeginTransaction();
    void Commit();
    void Rollback();
}