6dee4c5942
All of the additional lookup logic was essentially duplicating a relationship property of 'load_on_pending=True', which tells SQLAlchemy to lookup the relationship during object creation [1]. So we can dump all of this logic and just use that option. 1. http://docs.sqlalchemy.org/en/latest/orm/relationship_api.html #sqlalchemy.orm.relationship.params.load_on_pending Related: blueprint push-notifications Change-Id: I0e495a50f5cab9b6449825039d7683d77de1e763
44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development Company, LP
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from neutron_lib.db import constants as db_const
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from neutron_lib.db import model_base
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import sqlalchemy as sa
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from sqlalchemy import orm
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from neutron.db import models_v2
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class SubnetServiceType(model_base.BASEV2):
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"""Subnet Service Types table"""
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__tablename__ = "subnet_service_types"
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subnet_id = sa.Column(sa.String(36),
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sa.ForeignKey('subnets.id', ondelete="CASCADE"))
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# Service types must be valid device owners, therefore share max length
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service_type = sa.Column(sa.String(
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length=db_const.DEVICE_OWNER_FIELD_SIZE))
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subnet = orm.relationship(models_v2.Subnet, load_on_pending=True,
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backref=orm.backref('service_types',
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lazy='subquery',
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cascade='all, delete-orphan',
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uselist=True))
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__table_args__ = (
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sa.PrimaryKeyConstraint('subnet_id', 'service_type'),
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model_base.BASEV2.__table_args__
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)
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revises_on_change = ('subnet', )
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