airflow 0076_2_0_0_fix_description_field_in_connection_to_ 源码
airflow 0076_2_0_0_fix_description_field_in_connectionto 代码
文件路径：/airflow/migrations/versions/0076_2_0_0_fix_description_field_in_connectionto.py
#
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# 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
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# with the License. You may obtain a copy of the License at
#
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"""Fix description field in ``connection`` to be ``text``
Revision ID: 64a7d6477aae
Revises: f5b5ec089444
Create Date: 2020-11-25 08:56:11.866607
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = '64a7d6477aae'
down_revision = '61ec73d9401f'
branch_labels = None
depends_on = None
airflow_version = '2.0.0'
def upgrade():
"""Apply Fix description field in ``connection`` to be ``text``"""
conn = op.get_bind()
if conn.dialect.name == "sqlite":
# in sqlite TEXT and STRING column types are the same
return
if conn.dialect.name == "mysql":
op.alter_column(
'connection',
'description',
existing_type=sa.String(length=5000),
type_=sa.Text(length=5000),
existing_nullable=True,
)
else:
# postgres does not allow size modifier for text type
op.alter_column('connection', 'description', existing_type=sa.String(length=5000), type_=sa.Text())
def downgrade():
"""Unapply Fix description field in ``connection`` to be ``text``"""
conn = op.get_bind()
if conn.dialect.name == "sqlite":
# in sqlite TEXT and STRING column types are the same
return
if conn.dialect.name == "mysql":
op.alter_column(
'connection',
'description',
existing_type=sa.Text(5000),
type_=sa.String(length=5000),
existing_nullable=True,
)
else:
# postgres does not allow size modifier for text type
op.alter_column(
'connection',
'description',
existing_type=sa.Text(),
type_=sa.String(length=5000),
existing_nullable=True,
)
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