/// <summary>
/// Returns full graph of single BusinessObject of table that satisfies the given <paramref name="id"/> or null if no such element is found.
/// </summary>
/// <typeparam name="TBusinessEntity">The type of BusinessObject of source table.</typeparam>
/// <param name="id">Id of the BusinessObject.</param>
/// <returns>BusinessObject the satisfy the <paramref name="id"/>.</returns>
/// <exception cref="RepositoryException">When an error on the database level is occurred and couldn't be recovered.</exception>
public TBusinessEntity SingleOrDefaultWithGraph <TBusinessEntity>(int id)
where TBusinessEntity : class, new()
{
try
{
using (ShoppingListContext context = new ShoppingListContext())
{
var primaryKeyPredicate = CreatePredicate <TBusinessEntity>(context, id);
return(context.LoadAggregate(primaryKeyPredicate));
}
}
catch (Exception ex)
{
throw ThrowHelper.ReThrow <TBusinessEntity>(ex);
}
}
