airflow 0083_2_1_0_add_description_field_to_variable 源码
airflow 0083_2_1_0_add_description_field_to_variable 代码
文件路径：/airflow/migrations/versions/0083_2_1_0_add_description_field_to_variable.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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# 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
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"""Add description field to ``Variable`` model
Revision ID: e165e7455d70
Revises: 90d1635d7b86
Create Date: 2021-04-11 22:28:02.107290
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = 'e165e7455d70'
down_revision = '90d1635d7b86'
branch_labels = None
depends_on = None
airflow_version = '2.1.0'
def upgrade():
"""Apply Add description field to ``Variable`` model"""
with op.batch_alter_table('variable', schema=None) as batch_op:
batch_op.add_column(sa.Column('description', sa.Text(), nullable=True))
def downgrade():
"""Unapply Add description field to ``Variable`` model"""
with op.batch_alter_table('variable', schema=None) as batch_op:
batch_op.drop_column('description')
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