Duplicate Role Names on Asp.Net Identity and Multi-tenancy

Question

I\'m developing a Multi-tenancy web application with ASP.Net MVC and Identity 2.0. I have extended the IdentityRole like this:

public class ApplicationRole :         


        

Answer 1

Simply alter database's schema on ApplicationDbContext's OnModelCreating method like this:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    var role = modelBuilder.Entity<IdentityRole>()
        .ToTable("AspNetRoles");
    role.Property(r => r.Name)
        .IsRequired()
        .HasMaxLength(256)
        .HasColumnAnnotation("Index", new IndexAnnotation(
            new IndexAttribute("RoleNameIndex") 
            { IsUnique = false }));
}

But you must customize RoleValidator class also. Because default role validator invalidates duplicated role names.

public class MyRoleValidator:RoleValidator<ApplicationRole>
{
     public override async Task<IdentityResult> ValidateAsync(ApplicationRole item)
     {
         // implement your validation logic here

         return IdentityResult.Success;
     }
}

Now every time you create the role manager you must set the role validator.

roleManager.RoleValidator=new MyRoleValidator();