superset 2017-01-24_12-31_db0c65b146bd_update_slice_model_json 源码
superset 2017-01-24_12-31_db0c65b146bd_update_slice_model_json 代码
文件路径：/superset/migrations/versions/2017-01-24_12-31_db0c65b146bd_update_slice_model_json.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_slice_model_json
Revision ID: db0c65b146bd
Revises: f18570e03440
Create Date: 2017-01-24 12:31:06.541746
"""
# revision identifiers, used by Alembic.
revision = "db0c65b146bd"
down_revision = "f18570e03440"
import json
from alembic import op
from sqlalchemy import Column, Integer, String, Text
from sqlalchemy.ext.declarative import declarative_base
from superset import db
Base = declarative_base()
class Slice(Base):
"""Declarative class to do query in upgrade"""
__tablename__ = "slices"
id = Column(Integer, primary_key=True)
datasource_type = Column(String(200))
slice_name = Column(String(200))
params = Column(Text)
def upgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
slices = session.query(Slice).all()
slice_len = len(slices)
for i, slc in enumerate(slices):
try:
d = json.loads(slc.params or "{}")
slc.params = json.dumps(d, indent=2, sort_keys=True)
session.merge(slc)
session.commit()
print("Upgraded ({}/{}): {}".format(i, slice_len, slc.slice_name))
except Exception as ex:
print(slc.slice_name + " error: " + str(ex))
session.close()
def downgrade():
pass
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