How to mock django model's delete method

gistfile1.txt

def do_it(token, logger):
    try:
        tm = AMODEL.objects.get(unique_id=token)
        tm.delete()
    except Exception as e:
        logger.error("...")


class FakeLogger:
    def __init__(self):
        self.message = ""

    def error(self, message):
        self.message = "error:" + message


class ModelDeleteMethodTest(TransactionTestCase):

    @patch('app.models.AMODEL.delete')
    def test_exceptional_error(self, FakeMethod):
        reason = "test"
        FakeMethod.side_effect = Exception()
        logger = FakeLogger()
        do_it(self.token_id)
        assert logger.message == "error:..."