'Ensure we can query dynamic fields'

def test_dynamic_document_queries(self):

    p = self.Person()
    p.name = 'Dean'
    p.age = 22
    p.save()
    self.assertEqual(1, self.Person.objects(age=22).count())
    p = self.Person.objects(age=22)
    p = p.get()
    self.assertEqual(22, p.age)
