airflow 0118_2_4_2_add_missing_autoinc_fab 源码
airflow 0118_2_4_2_add_missing_autoinc_fab 代码
文件路径：/airflow/migrations/versions/0118_2_4_2_add_missing_autoinc_fab.py
#
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# 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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"""Add missing auto-increment to columns on FAB tables
Revision ID: b0d31815b5a6
Revises: ecb43d2a1842
Create Date: 2022-10-05 13:16:45.638490
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = 'b0d31815b5a6'
down_revision = 'ecb43d2a1842'
branch_labels = None
depends_on = None
airflow_version = '2.4.2'
def upgrade():
"""Apply migration.
If these columns are already of the right type (i.e. created by our
migration in 1.10.13 rather than FAB itself in an earlier version), this
migration will issue an alter statement to change them to what they already
are -- i.e. its a no-op.
These tables are small (100 to low 1k rows at most), so it's not too costly
to change them.
"""
conn = op.get_bind()
if conn.dialect.name in ['mssql', 'sqlite']:
# 1.10.12 didn't support SQL Server, so it couldn't have gotten this wrong --> nothing to correct
# SQLite autoinc was "implicit" for an INTEGER NOT NULL PRIMARY KEY
return
for table in (
'ab_permission',
'ab_view_menu',
'ab_role',
'ab_permission_view',
'ab_permission_view_role',
'ab_user',
'ab_user_role',
'ab_register_user',
):
with op.batch_alter_table(table) as batch:
kwargs = {}
if conn.dialect.name == 'postgresql':
kwargs['server_default'] = sa.Sequence(f'{table}_id_seq').next_value()
else:
kwargs['autoincrement'] = True
batch.alter_column("id", existing_type=sa.Integer(), existing_nullable=False, **kwargs)
def downgrade():
"""Unapply add_missing_autoinc_fab"""
# No downgrade needed, these _should_ have applied from 1.10.13 but didn't due to a previous bug!
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