Entity Framework 6 - Save Changes - sql

Question

I am trying to perform an insert with EF 6.
I have verified I have a connection to the database, because I can do a read:
List<Driver> drivers = DataContext.Drivers.ToList();
With a sql profiler, I can see this do a select on the database, and it returns an item I manually inserted.
I am trying to perform an insert like this:
var driver = new Driver();
driver.DriverName = "Blah";
DataContext.Drivers.Add(driver);
DataContext.ChangeTracker.HasChanges(); //false
DataContext.SaveChanges();
except nothing is inserted, and the changetracker seems to show that it has not detected any changes. I also saw suggestions to use .Attach but this had the same results.
Any help on what I am doing wrong?
Cheers
(MyEntities.Context.cs)
public partial class MyEntities : DbContext
{
public MyEntities()
: base("name=MyEntities")
{
}
public partial class MyDataContext : MyEntities
{
public class SqlDataService : DataServiceBase<...Data.MyDataContext>
{
//where I am trying to do the insert with the code above
edit: No not using code first (not that i'm aware of!) not sure if the above code samples help, but show how I have set up my classes

Answer 1

It seems you have AutomaticTrackChanges turned off somewhere in your code.
Try adding this line before the addition:
var driver = new Driver();
driver.DriverName = "Blah";
//Turning Automatic changes tracking on:
DataContext.Configuration.AutoDetectChangesEnabled = true;
DataContext.Drivers.Add(driver);
DataContext.ChangeTracker.HasChanges(); //True
DataContext.SaveChanges();
Note: AutoDetectChangesEnabled is usually turned off for performance considerations