superset 2020-10-21_21-09_96e99fb176a0_add_import_mixing_to_saved_query 源码
superset 2020-10-21_21-09_96e99fb176a0_add_import_mixing_to_saved_query 代码
文件路径：/superset/migrations/versions/2020-10-21_21-09_96e99fb176a0_add_import_mixing_to_saved_query.py
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# 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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"""add_import_mixing_to_saved_query
Revision ID: 96e99fb176a0
Revises: 585b0b1a7b18
Create Date: 2020-10-21 21:09:55.945956
"""
import os
from uuid import uuid4
import sqlalchemy as sa
from alembic import op
from sqlalchemy.exc import OperationalError
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy_utils import UUIDType
from superset import db
from superset.migrations.shared.utils import assign_uuids
# revision identifiers, used by Alembic.
revision = "96e99fb176a0"
down_revision = "585b0b1a7b18"
Base = declarative_base()
class ImportMixin:
id = sa.Column(sa.Integer, primary_key=True)
uuid = sa.Column(UUIDType(binary=True), primary_key=False, default=uuid4)
class SavedQuery(Base, ImportMixin):
__tablename__ = "saved_query"
default_batch_size = int(os.environ.get("BATCH_SIZE", 200))
def upgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
# Add uuid column
try:
with op.batch_alter_table("saved_query") as batch_op:
batch_op.add_column(
sa.Column(
"uuid",
UUIDType(binary=True),
primary_key=False,
default=uuid4,
),
)
except OperationalError:
# Ignore column update errors so that we can run upgrade multiple times
pass
assign_uuids(SavedQuery, session)
try:
# Add uniqueness constraint
with op.batch_alter_table("saved_query") as batch_op:
# Batch mode is required for sqlite
batch_op.create_unique_constraint("uq_saved_query_uuid", ["uuid"])
except OperationalError:
pass
def downgrade():
bind = op.get_bind()
session = db.Session(bind=bind)
# Remove uuid column
with op.batch_alter_table("saved_query") as batch_op:
batch_op.drop_constraint("uq_saved_query_uuid", type_="unique")
batch_op.drop_column("uuid")
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