Linq entityref assignment in one to many relation - database

Question

i have some problem with my linq database with a one to many relation. Here are classes:
private EntityRef<Account> _account;
[Association(Storage = "_account", ThisKey = "IDMovement", OtherKey = "IDAccount", IsForeignKey = true)]
public Account Account
{
get { return this._account.Entity; }
set
{
Account previousValue = this._account.Entity;
if (((previousValue != value) || (this._account.HasLoadedOrAssignedValue == false)))
{
NotifyPropertyChanging("Account");
if ((previousValue != null))
{
this._account.Entity = null;
previousValue.Movements.Remove(this);
}
this._account.Entity = value;
if ((value != null))
{
value.Movements.Add(this);
}
NotifyPropertyChanged("Account");
}
}
}
and on the other side:
private EntitySet<Movement> _movements;
[Association(Storage = "_movements", OtherKey = "IDMovement", ThisKey = "IDAccount")]
public EntitySet<Movement> Movements
{
get { return this._movements; }
set { this._movements.Assign(value); }
}
private void OnMovementAdded(Movement movement)
{
NotifyPropertyChanging("Movement");
movement.Account = this;
NotifyPropertyChanged("Movement");
}
private void OnMovementRemoved(Movement movement)
{
NotifyPropertyChanging("Movement");
movement.Account = null;
NotifyPropertyChanged("Movement");
}
my problem is that when i have to insert new movements in the database i don't know how to assign the "EntityRef _account" variable with a value that i already have in the database.
For example: i have to insert a movement for the account "general", this account is already in my database of course...how can i say to my movement that the account "general" that it has in "movement.Account" it's exactly the same included in my database?
I tried something like that but It doesn't work because it's like i have created a new account:
Movement movement = new Movement();
movement.Category = (from f in context.Categories
where f.Name == this.Categories.ElementAt(this.ChoosenCategory).Name
select f).FirstOrDefault();
movement.Account = (from f in context.Accounts
where f.Name == ChoosenAccount.Name
select f).FirstOrDefault();
context.Movements.InsertOnSubmit(movement);
context.SubmitChanges();

Answer 1

You need to call Load() method for EntityRef such as if (!order.CustomersReference.IsLoaded)
order.CustomersReference.Load();