实体框架未保存对表所做的所有更改

Question

I'm trying to save data to two different tables in one method. The first db.SaveChanges() call, updates the data correctly but the second time I call SaveChanges, it doesn't do anything, even when I clearly change the data.

PhaseStatus truckPhase = db.PhaseStatus.Where(x => x.TruckId == truckId).FirstOrDefault();
RTrucks truck = db.RTrucks.Where(x => x.Id == truckId).FirstOrDefault();

using (var ContextTransaction = db.Database.BeginTransaction())
{
    db.PhaseStatus.Attach(truckPhase);
    var entryPS = db.Entry(truckPhase);
    entryPS.State = EntityState.Modified;
    db.SaveChanges(); //Success

    if (truckPhase.Phase.PhaseName == "Not Started")
        truck.Status = "Quoted";
    else truck.Status = "Active";

    db.RTrucks.Attach(truck);
    var entryRT = db.Entry(truck);
    entryPS.State = EntityState.Modified;
    db.SaveChanges(); //Fails with no errors
    ContextTransaction.Commit();
}

Does anyone have any idea why EF6 would do this? Am I doing something wrong?

Answer 1

In your second block change:

entryPS.State = EntityState.Modified;

to

entryRT.State = EntityState.Modified;