superset 2018-06-04_11-12_c5756bec8b47_time_grain_sqla 源码
superset 2018-06-04_11-12_c5756bec8b47_time_grain_sqla 代码
文件路径：/superset/migrations/versions/2018-06-04_11-12_c5756bec8b47_time_grain_sqla.py
# Licensed to the Apache Software Foundation (ASF) under one
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# 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
#
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# 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
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# under the License.
"""Time grain SQLA
Revision ID: c5756bec8b47
Revises: e502db2af7be
Create Date: 2018-06-04 11:12:59.878742
"""
# revision identifiers, used by Alembic.
revision = "c5756bec8b47"
down_revision = "e502db2af7be"
import json
from alembic import op
from sqlalchemy import Column, Integer, 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)
params = Column(Text)
def upgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
for slc in session.query(Slice).all():
try:
params = json.loads(slc.params)
if params.get("time_grain_sqla") == "Time Column":
params["time_grain_sqla"] = None
slc.params = json.dumps(params, sort_keys=True)
except Exception:
pass
session.commit()
session.close()
def downgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
for slc in session.query(Slice).all():
try:
params = json.loads(slc.params)
if params.get("time_grain_sqla") is None:
params["time_grain_sqla"] = "Time Column"
slc.params = json.dumps(params, sort_keys=True)
except Exception:
pass
session.commit()
session.close()
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