77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2011 X.commerce, a business unit of eBay Inc.
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# Copyright 2011 Piston Cloud Computing, Inc.
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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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"""Base classes and custome fields for balancer models."""
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import json
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import object_mapper
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from sqlalchemy.types import TypeDecorator
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from sqlalchemy import Text
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Base = declarative_base()
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class DictBase(object):
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def to_dict(self):
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return dict(self.iteritems())
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def __setitem__(self, key, value):
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setattr(self, key, value)
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def __getitem__(self, key):
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return getattr(self, key)
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def get(self, key, default=None):
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return getattr(self, key, default)
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def __iter__(self):
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return (col.name for col in object_mapper(self).columns)
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def keys(self):
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return list(self)
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def update(self, values):
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for key, value in values.iteritems():
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if isinstance(value, dict):
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value = value.copy()
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setattr(self, key, value)
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def iteritems(self):
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items = []
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for key in self:
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value = getattr(self, key)
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if isinstance(value, dict):
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value = value.copy()
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items.append((key, value))
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return iter(items)
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class JsonBlob(TypeDecorator):
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impl = Text
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def process_bind_param(self, value, dialect):
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return json.dumps(value)
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def process_result_value(self, value, dialect):
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return json.loads(value)
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