Route test_write_cascades

test/orm/test_cascade.py:None–None

testing.combinations(
        ({"delete"}, {"none"}),
        (
            {"all, delete-orphan"},
            {"refresh-expire", "expunge", "merge"},
        ),
        ({"save-update, expunge"}, {"

import copy

from sqlalchemy import exc as sa_exc
from sqlalchemy import ForeignKey