airflow 0097_2_3_0_increase_length_of_email_and_username 源码
airflow 0097_2_3_0_increase_length_of_email_and_username 代码
文件路径:/airflow/migrations/versions/0097_2_3_0_increase_length_of_email_and_username.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.
"""Increase length of email and username in ``ab_user`` and ``ab_register_user`` table to ``256`` characters
Revision ID: 5e3ec427fdd3
Revises: 587bdf053233
Create Date: 2021-12-01 11:49:26.390210
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from airflow.migrations.utils import get_mssql_table_constraints
# revision identifiers, used by Alembic.
revision = '5e3ec427fdd3'
down_revision = '587bdf053233'
branch_labels = None
depends_on = None
airflow_version = '2.3.0'
def upgrade():
"""Increase length of email from 64 to 256 characters"""
with op.batch_alter_table('ab_user') as batch_op:
batch_op.alter_column('username', type_=sa.String(256))
batch_op.alter_column('email', type_=sa.String(256))
with op.batch_alter_table('ab_register_user') as batch_op:
batch_op.alter_column('username', type_=sa.String(256))
batch_op.alter_column('email', type_=sa.String(256))
def downgrade():
"""Revert length of email from 256 to 64 characters"""
conn = op.get_bind()
if conn.dialect.name != 'mssql':
with op.batch_alter_table('ab_user') as batch_op:
batch_op.alter_column('username', type_=sa.String(64), nullable=False)
batch_op.alter_column('email', type_=sa.String(64))
with op.batch_alter_table('ab_register_user') as batch_op:
batch_op.alter_column('username', type_=sa.String(64))
batch_op.alter_column('email', type_=sa.String(64))
else:
# MSSQL doesn't drop implicit unique constraints it created
# We need to drop the two unique constraints explicitly
with op.batch_alter_table('ab_user') as batch_op:
# Drop the unique constraint on username and email
constraints = get_mssql_table_constraints(conn, 'ab_user')
unique_key, _ = constraints['UNIQUE'].popitem()
batch_op.drop_constraint(unique_key, type_='unique')
unique_key, _ = constraints['UNIQUE'].popitem()
batch_op.drop_constraint(unique_key, type_='unique')
batch_op.alter_column('username', type_=sa.String(64), nullable=False)
batch_op.create_unique_constraint(None, ['username'])
batch_op.alter_column('email', type_=sa.String(64))
batch_op.create_unique_constraint(None, ['email'])
with op.batch_alter_table('ab_register_user') as batch_op:
# Drop the unique constraint on username and email
constraints = get_mssql_table_constraints(conn, 'ab_register_user')
for k, _ in constraints.get('UNIQUE').items():
batch_op.drop_constraint(k, type_='unique')
batch_op.alter_column('username', type_=sa.String(64))
batch_op.create_unique_constraint(None, ['username'])
batch_op.alter_column('email', type_=sa.String(64))
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