Clone an EF6 record with relations

Question

I'm getting a record from EF6 with

Context
.MyRepo
.Include(p => p.MyRelation)
.AsNoTracking()
.SingleOrDefault(p => p.Uuid == recordUuid);

Then I try to insert a copy of the record zith

myRecord.Uuid = Guid.NewGuid();
myRecord.EntityKey = new System.Data.EntityKey("modelqualifiedname", "Id", 1726526);

Context.MyRepo.AddObject(myRecord);
Context.SaveChanges();

But it fails with this message

"An object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key."

I tried to set the EntityKey to null , like it is in a new record; but it did not help. Any idea?

Answer 1

This object is already tracked by EF.

You have to either modify its key or change its state to Modified.

Context.MyRepo.Entry(myRecord).State = EntityState.Modified;

and then save it.

Answer 2

我认为您是由于子对象而出现错误，应该尝试为每个子对象设置一个新键。