airflow 0042_1_10_3_task_reschedule_fk_on_cascade_delete 源码
airflow 0042_1_10_3_task_reschedule_fk_on_cascade_delete 代码
文件路径：/airflow/migrations/versions/0042_1_10_3_task_reschedule_fk_on_cascade_delete.py
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
"""task reschedule foreign key on cascade delete
Revision ID: 939bb1e647c8
Revises: dd4ecb8fbee3
Create Date: 2019-02-04 20:21:50.669751
"""
from __future__ import annotations
from alembic import op
# revision identifiers, used by Alembic.
revision = '939bb1e647c8'
down_revision = 'dd4ecb8fbee3'
branch_labels = None
depends_on = None
airflow_version = '1.10.3'
def upgrade():
with op.batch_alter_table('task_reschedule') as batch_op:
batch_op.drop_constraint('task_reschedule_dag_task_date_fkey', type_='foreignkey')
batch_op.create_foreign_key(
'task_reschedule_dag_task_date_fkey',
'task_instance',
['task_id', 'dag_id', 'execution_date'],
['task_id', 'dag_id', 'execution_date'],
ondelete='CASCADE',
)
def downgrade():
with op.batch_alter_table('task_reschedule') as batch_op:
batch_op.drop_constraint('task_reschedule_dag_task_date_fkey', type_='foreignkey')
batch_op.create_foreign_key(
'task_reschedule_dag_task_date_fkey',
'task_instance',
['task_id', 'dag_id', 'execution_date'],
['task_id', 'dag_id', 'execution_date'],
)
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