superset 2018-06-13_10-20_4451805bbaa1_remove_double_percents 源码
superset 2018-06-13_10-20_4451805bbaa1_remove_double_percents 代码
文件路径：/superset/migrations/versions/2018-06-13_10-20_4451805bbaa1_remove_double_percents.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.
"""remove double percents
Revision ID: 4451805bbaa1
Revises: afb7730f6a9c
Create Date: 2018-06-13 10:20:35.846744
"""
# revision identifiers, used by Alembic.
revision = "4451805bbaa1"
down_revision = "bddc498dd179"
import json
from alembic import op
from sqlalchemy import Column, create_engine, ForeignKey, Integer, String, Text
from sqlalchemy.ext.declarative import declarative_base
from superset import db
Base = declarative_base()
class Slice(Base):
__tablename__ = "slices"
id = Column(Integer, primary_key=True)
datasource_id = Column(Integer, ForeignKey("tables.id"))
datasource_type = Column(String(200))
params = Column(Text)
class Table(Base):
__tablename__ = "tables"
id = Column(Integer, primary_key=True)
database_id = Column(Integer, ForeignKey("dbs.id"))
class Database(Base):
__tablename__ = "dbs"
id = Column(Integer, primary_key=True)
sqlalchemy_uri = Column(String(1024))
def replace(source, target):
bind = op.get_bind()
session = db.Session(bind=bind)
query = (
session.query(Slice, Database)
.join(Table, Slice.datasource_id == Table.id)
.join(Database, Table.database_id == Database.id)
.filter(Slice.datasource_type == "table")
.all()
)
for slc, database in query:
try:
engine = create_engine(database.sqlalchemy_uri)
if engine.dialect.identifier_preparer._double_percents:
params = json.loads(slc.params)
if "adhoc_filters" in params:
for filt in params["adhoc_filters"]:
if "sqlExpression" in filt:
filt["sqlExpression"] = filt["sqlExpression"].replace(
source, target
)
slc.params = json.dumps(params, sort_keys=True)
except Exception:
pass
session.commit()
session.close()
def upgrade():
replace("%%", "%")
def downgrade():
replace("%", "%%")
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