fenix/fenix/db/sqlalchemy/model_base.py

52 lines
1.7 KiB
Python

# Copyright (c) 2013 Mirantis Inc.
#
# 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 oslo_db.sqlalchemy import models
from sqlalchemy.ext import declarative
from sqlalchemy.orm import attributes
class _FenixBase(models.ModelBase, models.TimestampMixin):
"""Base class for all Fenix SQLAlchemy DB Models."""
def to_dict(self, include=None):
"""sqlalchemy based automatic to_dict method."""
d = {}
# if a column is unloaded at this point, it is
# probably deferred. We do not want to access it
# here and thereby cause it to load...
unloaded = attributes.instance_state(self).unloaded
columns = self.__table__.columns
if include:
columns = [col for col in columns if col.name in include]
for col in columns:
if col.name not in unloaded:
d[col.name] = getattr(self, col.name)
datetime_to_str(d, 'created_at')
datetime_to_str(d, 'updated_at')
return d
def datetime_to_str(dct, attr_name):
if dct.get(attr_name) is not None:
dct[attr_name] = dct[attr_name].isoformat(' ')
FenixBase = declarative.declarative_base(cls=_FenixBase)