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OpenStack Study: model_base.py**** CubicPower OpenStack Study ****
# Copyright (c) 2012 OpenStack Foundation. # # Licensed 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. from sqlalchemy.ext import declarative from sqlalchemy import orm from neutron.openstack.common.db.sqlalchemy import models
**** CubicPower OpenStack Study **** class NeutronBase(models.ModelBase): """Base class for Neutron Models.""" __table_args__ = {'mysql_engine': 'InnoDB'}
**** CubicPower OpenStack Study **** def __iter__(self): self._i = iter(orm.object_mapper(self).columns) return self
**** CubicPower OpenStack Study **** def next(self): n = self._i.next().name return n, getattr(self, n)
**** CubicPower OpenStack Study **** def __repr__(self): """sqlalchemy based automatic __repr__ method.""" items = ['%s=%r' % (col.name, getattr(self, col.name)) for col in self.__table__.columns] return "<%s.%s[object at %x] {%s}>" % (self.__class__.__module__, self.__class__.__name__, id(self), ', '.join(items))
**** CubicPower OpenStack Study **** class NeutronBaseV2(NeutronBase): @declarative.declared_attr
**** CubicPower OpenStack Study **** def __tablename__(cls): # NOTE(jkoelker) use the pluralized name of the class as the table return cls.__name__.lower() + 's' BASEV2 = declarative.declarative_base(cls=NeutronBaseV2)
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