notsupportedexception

I've got a problem with NotSupportedException, I'm getting: "An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext." partial class SupplyOfert : Model { public SupplyOfert(int id = 0) { if (id > 0) this.get(id); } public Supplier supplier { get { return this.Supplier; } set { this.Supplier = db.Suppliers.SingleOrDefault(s => s.id == value.id); } } public override bool get(int id) { SupplyOfert so = (SupplyOfert)db.SupplyOferts.SingleOrDefault(s => s.id == id).Copy(this, "Supplies"); this._Supplies = so._Supplies; so._Supplies

Im trying to make a attribute characteristic randomiser for my nephews board game and I'm trying to write the attributes to an external file so that he can use them later. when i am trying to write to the file it comes up with the error speedE = str('Speed -', str(speed)) TypeError: decoding str is not supported my code is adding the calculated attribute to the name of the attribute. I.E. ('Strength - ', strengthE) my code is ... import random char1 = open('Character1.txt', 'w') strength = 10 strength += int(random.randint(1, 12) / random.randint(1,4)) speed = 10 speed += int(random.randint(1,

I'm having some trouble with finding the right syntax to accomplish the following: Is it possible with LINQ (Lambda Expression) to .GroupBy data and instead of using the usual .Sum() or .Count() I want the resulting data to be a List of Int. I defined my own class named: Filter_IDs. Its constructor needs two parameters: public int? type; // Represents the object_type column from my database public List<int?> objects; // Represents the object_id column from my database I want to load data from my database into this object. The following LINQ query should result in a List of Filter_IDs: The