superset 2016-09-07_23-50_33d996bcc382_update_slice_model 源码
superset 2016-09-07_23-50_33d996bcc382_update_slice_model 代码
文件路径：/superset/migrations/versions/2016-09-07_23-50_33d996bcc382_update_slice_model.py
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# to you under the Apache License, Version 2.0 (the
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# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
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"""update slice model
Revision ID: 33d996bcc382
Revises: 41f6a59a61f2
Create Date: 2016-09-07 23:50:59.366779
"""
import sqlalchemy as sa
from alembic import op
from sqlalchemy import Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from superset import db
# revision identifiers, used by Alembic.
revision = "33d996bcc382"
down_revision = "41f6a59a61f2"
Base = declarative_base()
class Slice(Base):
"""Declarative class to do query in upgrade"""
__tablename__ = "slices"
id = Column(Integer, primary_key=True)
datasource_id = Column(Integer)
druid_datasource_id = Column(Integer)
table_id = Column(Integer)
datasource_type = Column(String(200))
def upgrade():
bind = op.get_bind()
op.add_column("slices", sa.Column("datasource_id", sa.Integer()))
session = db.Session(bind=bind)
for slc in session.query(Slice).all():
if slc.druid_datasource_id:
slc.datasource_id = slc.druid_datasource_id
if slc.table_id:
slc.datasource_id = slc.table_id
session.merge(slc)
session.commit()
session.close()
def downgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
for slc in session.query(Slice).all():
if slc.datasource_type == "druid":
slc.druid_datasource_id = slc.datasource_id
if slc.datasource_type == "table":
slc.table_id = slc.datasource_id
session.merge(slc)
session.commit()
session.close()
op.drop_column("slices", "datasource_id")
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