Question

In the following example

using (var context = new MyEntities() 
{       
   // Delete old data.
   foreach (var data obsoleteData)
   {
     context.DeleteObject(data);
   }

   // Create new data.
   var data = new DataEntity();

   // Initialize data
   // ...

   var id = FoundItem();
   var items = new List<MyItems>();
   foreach (var n in context.Sources)
   {
     var subItems = (from i in context.Entities1 
                     from g in i.Entity1Relations 
                     where g.Type == 0 && g.Id == id 
                     select i).ToList();

     Contract.Assert((from i in subItems 
             where i.SomeCount == 0 select i).FirstOrDefault() == null);
     items.add(FindSource(n, subItems);
   }

   foreach(var i1 in items)
   {
     data.SubItems.Add(i1);
   }

   context.SaveChanges();
}

This asserts sometimes, but the database SomeCount is always > 0!

The Entity1Relations is a table that resolves m : n.

I assume that the entity framework doesn’t queries the database everytime.

Is a solution for this problem available?

Answer 1

I have found an error in FindSource that modified SomeCount Property of other objects. So it has nothing to do with EF.