Add a migration that deletes redundant delayed calls

* Due to the bug https://bugs.launchpad.net/mistral/+bug/1861988
  some Mistral installations may have redundant delayed calls with
  the empty "key" column. This patch adds a DB migration that cleans
  them up.

Change-Id: Ic46d3d711a03fbd6364809a0fddcbb48f3e28d2a
Closes-Bug: #1887335
This commit is contained in:
Renat Akhmerov 2020-07-13 13:02:48 +07:00
parent e049c5014a
commit 2a1736f070
1 changed files with 47 additions and 0 deletions

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# Copyright 2020 Nokia Software.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Delete delayed calls with key=NULL.
Revision ID: 038
Revises: 037
Create Date: 2020-7-13 13:20:00
"""
# revision identifiers, used by Alembic.
from alembic import op
import sqlalchemy as sa
from sqlalchemy.sql import table, column
revision = '038'
down_revision = '037'
def upgrade():
# See https://bugs.launchpad.net/mistral/+bug/1861988.
# Due to this bug there may be redundant delayed calls in DB.
# We need to delete all rows where the "key" column is None.
session = sa.orm.Session(bind=op.get_bind())
delayed_calls = table('delayed_calls_v2', column('key'))
with session.begin(subtransactions=True):
session.execute(
delayed_calls.delete().where(delayed_calls.c.key==None) # noqa
)
session.commit()