superset 2016-04-25_08-54_c3a8f8611885_materializing_permission 源码
superset 2016-04-25_08-54_c3a8f8611885_materializing_permission 代码
文件路径：/superset/migrations/versions/2016-04-25_08-54_c3a8f8611885_materializing_permission.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.
"""Materializing permission
Revision ID: c3a8f8611885
Revises: 4fa88fe24e94
Create Date: 2016-04-25 08:54:04.303859
"""
import sqlalchemy as sa
from alembic import op
from sqlalchemy import Column, ForeignKey, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from superset import db
# revision identifiers, used by Alembic.
revision = "c3a8f8611885"
down_revision = "4fa88fe24e94"
Base = declarative_base()
class Slice(Base):
"""Declarative class to do query in upgrade"""
__tablename__ = "slices"
id = Column(Integer, primary_key=True)
slice_name = Column(String(250))
druid_datasource_id = Column(Integer, ForeignKey("datasources.id"))
table_id = Column(Integer, ForeignKey("tables.id"))
perm = Column(String(2000))
def upgrade():
bind = op.get_bind()
op.add_column("slices", sa.Column("perm", sa.String(length=2000), nullable=True))
session = db.Session(bind=bind)
# Use Slice class defined here instead of models.Slice
for slc in session.query(Slice).all():
if slc.datasource:
slc.perm = slc.datasource.perm
session.merge(slc)
session.commit()
db.session.close()
def downgrade():
# Use batch_alter_table because dropping columns is not supported in SQLite
with op.batch_alter_table("slices") as batch_op:
batch_op.drop_column("perm")
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