superset 2018-07-20_16-08_937d04c16b64_update_datasources 源码
superset 2018-07-20_16-08_937d04c16b64_update_datasources 代码
文件路径：/superset/migrations/versions/2018-07-20_16-08_937d04c16b64_update_datasources.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.
"""update datasources
Revision ID: 937d04c16b64
Revises: d94d33dbe938
Create Date: 2018-07-20 16:08:10.195843
"""
# revision identifiers, used by Alembic.
revision = "937d04c16b64"
down_revision = "d94d33dbe938"
import sqlalchemy as sa
from alembic import op
def upgrade():
# Enforce that the datasource_name column be non-nullable.
with op.batch_alter_table("datasources") as batch_op:
batch_op.alter_column(
"datasource_name", existing_type=sa.String(255), nullable=False
)
def downgrade():
# Forego that the datasource_name column be non-nullable.
with op.batch_alter_table("datasources") as batch_op:
batch_op.alter_column(
"datasource_name", existing_type=sa.String(255), nullable=True
)
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