superset 2018-02-13_08-07_e866bd2d4976_smaller_grid 源码
superset 2018-02-13_08-07_e866bd2d4976_smaller_grid 代码
文件路径：/superset/migrations/versions/2018-02-13_08-07_e866bd2d4976_smaller_grid.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.
"""smaller_grid
Revision ID: e866bd2d4976
Revises: 21e88bc06c02
Create Date: 2018-02-13 08:07:40.766277
"""
import json
import sqlalchemy as sa
from alembic import op
from flask_appbuilder.models.mixins import AuditMixin
from sqlalchemy.ext.declarative import declarative_base
from superset import db
revision = "e866bd2d4976"
down_revision = "21e88bc06c02"
Base = declarative_base()
RATIO = 4
class Dashboard(Base):
"""Declarative class to do query in upgrade"""
__tablename__ = "dashboards"
id = sa.Column(sa.Integer, primary_key=True)
position_json = sa.Column(sa.Text)
dashboard_title = sa.Column(sa.String(500))
def upgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
dashboards = session.query(Dashboard).all()
for i, dashboard in enumerate(dashboards):
print("Upgrading ({}/{}): {}".format(i, len(dashboards), dashboard.id))
positions = json.loads(dashboard.position_json or "{}")
for pos in positions:
if pos.get("v", 0) == 0:
pos["size_x"] = pos["size_x"] * RATIO
pos["size_y"] = pos["size_y"] * RATIO
pos["col"] = ((pos["col"] - 1) * RATIO) + 1
pos["row"] = pos["row"] * RATIO
pos["v"] = 1
dashboard.position_json = json.dumps(positions, indent=2)
session.merge(dashboard)
session.commit()
session.close()
def downgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
dashboards = session.query(Dashboard).all()
for i, dashboard in enumerate(dashboards):
print("Downgrading ({}/{}): {}".format(i, len(dashboards), dashboard.id))
positions = json.loads(dashboard.position_json or "{}")
for pos in positions:
if pos.get("v", 0) == 1:
pos["size_x"] = pos["size_x"] / 4
pos["size_y"] = pos["size_y"] / 4
pos["col"] = ((pos["col"] - 1) / 4) + 1
pos["row"] = pos["row"] / 4
pos["v"] = 0
dashboard.position_json = json.dumps(positions, indent=2)
session.merge(dashboard)
session.commit()
pass
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