108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2015 - Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import six
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from oslo_db.sqlalchemy import models as oslo_models
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import sqlalchemy as sa
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from sqlalchemy.ext import declarative
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from sqlalchemy.orm import attributes
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from lbaas import utils
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def id_column():
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return sa.Column(
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sa.String(36),
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primary_key=True,
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default=utils.generate_unicode_uuid
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)
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class _LbaasModelBase(oslo_models.ModelBase, oslo_models.TimestampMixin):
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"""Base class for all LBaaS SQLAlchemy DB Models."""
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__table__ = None
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__hash__ = object.__hash__
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def __init__(self, **kwargs):
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for key, value in kwargs.items():
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setattr(self, key, value)
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def __eq__(self, other):
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if type(self) is not type(other):
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return False
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for col in self.__table__.columns:
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# In case of single table inheritance a class attribute
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# corresponding to a table column may not exist so we need
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# to skip these attributes.
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if (hasattr(self, col.name)
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and hasattr(other, col.name)
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and getattr(self, col.name) != getattr(other, col.name)):
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return False
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return True
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def to_dict(self):
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"""sqlalchemy based automatic to_dict method."""
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d = {}
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# If a column is unloaded at this point, it is
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# probably deferred. We do not want to access it
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# here and thereby cause it to load.
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unloaded = attributes.instance_state(self).unloaded
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for col in self.__table__.columns:
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if col.name not in unloaded and hasattr(self, col.name):
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d[col.name] = getattr(self, col.name)
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datetime_to_str(d, 'created_at')
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datetime_to_str(d, 'updated_at')
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return d
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def get_clone(self):
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"""Clones current object, loads all fields and returns the result."""
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m = self.__class__()
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for col in self.__table__.columns:
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if hasattr(self, col.name):
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setattr(m, col.name, getattr(self, col.name))
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setattr(m, 'created_at', getattr(self, 'created_at').isoformat(' '))
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updated_at = getattr(self, 'updated_at')
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# NOTE(nmakhotkin): 'updated_at' field is empty for just created
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# object since it has not updated yet.
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if updated_at:
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setattr(m, 'updated_at', updated_at.isoformat(' '))
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return m
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def __repr__(self):
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return '%s %s' % (type(self).__name__, self.to_dict().__repr__())
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def datetime_to_str(dct, attr_name):
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if (dct.get(attr_name) is not None
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and not isinstance(dct.get(attr_name), six.string_types)):
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dct[attr_name] = dct[attr_name].isoformat(' ')
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LbaasModelBase = declarative.declarative_base(cls=_LbaasModelBase)
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