Add TPT Inherited Code First Model to Linq Fluent API - entity-framework

Question

I'm having problems extending the Fluent API to my inheritance classes. I have taken the TPT (table per type) method and each type of the inheritance has a table. I like table per type because the database is fully normalized and easy to maintain. I am not getting the inherited model ServiceCompany to work with the Fluent API.
Base Abstract Class
public abstract class Vendor
{
[Key]
public int VendorID { get; set; }
[Required]
public string CompanyName { get; set; }
[Required]
public int StreetNumber { get; set; }
[Required]
public string StreetName { get; set; }
}
Inherited ServiceCompany Class from Vendor
[Table("ServiceCompanies")]
public class ServiceCompany : Vendor
{
public string ACHClaim { get; set; }
public virtual ICollection<SubContractorCompany> SubContractorCompanies { get; set; }
public virtual ICollection<ServiceCompanyUser> SubContractorUsers { get; set; }
}
Where I added the entity models to enable the Fluent API with onModelCreating()
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext()
: base("DefaultConnection", throwIfV1Schema: false)
{
}
public DbSet<Vendor> Vendors { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<ServiceCompany>().ToTable("ServiceCompanies");
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
}
I would like to be able to do something like this with the fluent API.
var ListofServiceCompanies = db.ServiceCompanies.All()
and not like this
var ListofServiceCompanies = db.Vendor.SelectMany( Vendor is a ServiceComapny...etc)
I prefer to set up the entities correctly and make the code nice and easy to use. Any insight or knowledge is appreciated.

Answer 1

You can do that by calling OfType extension method like below:
var ListofServiceCompanies = db.Vendor.OfType<Vendor>().ToList();
Or you can just add a DbSet<ServiceCompany> ServiceCompanies { get; set; } into your DbContext so it will look like this:
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext()
: base("DefaultConnection", throwIfV1Schema: false)
{
}
public DbSet<Vendor> Vendors { get; set; }
public DbSet<ServiceCompany> ServiceCompanies { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<ServiceCompany>().ToTable("ServiceCompanies");
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
}
Then just call:
var ListofServiceCompanies = db.ServiceCompanies.ToList();