john-bodley commented on a change in pull request #9684: URL: https://github.com/apache/incubator-superset/pull/9684#discussion_r417549551
########## File path: superset/migrations/versions/620241d1153f_update_time_grain_sqla.py ########## @@ -0,0 +1,112 @@ +# 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. +"""update time_grain_sqla + +Revision ID: 620241d1153f +Revises: f9a30386bd74 +Create Date: 2020-04-29 09:24:04.952368 + +""" + +# revision identifiers, used by Alembic. +revision = "620241d1153f" +down_revision = "f9a30386bd74" + +import json + +from alembic import op +from sqlalchemy import Column, ForeignKey, Integer, Text +from sqlalchemy.engine.url import make_url +from sqlalchemy.ext.declarative import declarative_base + +from superset import db, db_engine_specs +from superset.utils import core as utils + +Base = declarative_base() + + +class Database(Base): + __tablename__ = "dbs" + + id = Column(Integer, primary_key=True) + sqlalchemy_uri = Column(Text) + + def grains(self): + url = make_url(self.sqlalchemy_uri) + backend = url.get_backend_name() + db_engine_spec = db_engine_specs.engines.get( + backend, db_engine_specs.BaseEngineSpec + ) + return db_engine_spec.get_time_grains() + + +class Table(Base): + __tablename__ = "tables" + + id = Column(Integer, primary_key=True) + database_id = Column(Integer, ForeignKey("dbs.id")) + + +class Slice(Base): + __tablename__ = "slices" + + id = Column(Integer, primary_key=True) + params = Column(Text) + datasource_type = Column(Text) + datasource_id = Column(Integer) + + [email protected] +def name_to_duration(time_grains): Review comment: I don't think you want to memoize this signature as different databases may have different mappings for the same `time_grains`. It seems that, ``` @utils.memoized def name_to_duration(database): time_grains = database.grains() ... ``` would be safer. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
