airflow 0045_1_10_7_add_root_dag_id_to_dag 源码
airflow 0045_1_10_7_add_root_dag_id_to_dag 代码
文件路径：/airflow/migrations/versions/0045_1_10_7_add_root_dag_id_to_dag.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
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# KIND, either express or implied. See the License for the
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# under the License.
"""Add ``root_dag_id`` to ``DAG``
Revision ID: b3b105409875
Revises: d38e04c12aa2
Create Date: 2019-09-28 23:20:01.744775
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from airflow.migrations.db_types import StringID
# revision identifiers, used by Alembic.
revision = 'b3b105409875'
down_revision = 'd38e04c12aa2'
branch_labels = None
depends_on = None
airflow_version = '1.10.7'
def upgrade():
"""Apply Add ``root_dag_id`` to ``DAG``"""
op.add_column('dag', sa.Column('root_dag_id', StringID(), nullable=True))
op.create_index('idx_root_dag_id', 'dag', ['root_dag_id'], unique=False)
def downgrade():
"""Unapply Add ``root_dag_id`` to ``DAG``"""
op.drop_index('idx_root_dag_id', table_name='dag')
op.drop_column('dag', 'root_dag_id')
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