'Get can accept pk or the real attribute name'

def test_get(self):

    self.assertEqual(Employee.objects.get(pk=123), self.dan)
    self.assertEqual(Employee.objects.get(pk=456), self.fran)
    with self.assertRaises(Employee.DoesNotExist):
        Employee.objects.get(pk=42)
    self.assertEqual(Employee.objects.get(employee_code=123), self.dan)
