55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
# Copyright 2012 Managed I.T.
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#
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# Author: Kiall Mac Innes <kiall@managedit.ie>
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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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import uuid
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from sqlalchemy.types import TypeDecorator, CHAR
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from sqlalchemy.dialects.postgresql import UUID as pgUUID
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class UUID(TypeDecorator):
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"""Platform-independent UUID type.
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Uses Postgresql's UUID type, otherwise uses
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CHAR(32), storing as stringified hex values.
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Copied verbatim from SQLAlchemy documentation.
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"""
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impl = CHAR
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def load_dialect_impl(self, dialect):
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if dialect.name == 'postgresql':
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return dialect.type_descriptor(pgUUID())
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else:
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return dialect.type_descriptor(CHAR(32))
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def process_bind_param(self, value, dialect):
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if value is None:
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return value
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elif dialect.name == 'postgresql':
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return str(value)
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else:
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if not isinstance(value, uuid.UUID):
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return "%.32x" % uuid.UUID(value).int
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else:
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# hexstring
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return "%.32x" % value.int
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def process_result_value(self, value, dialect):
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if value is None:
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return value
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else:
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return str(uuid.UUID(value))
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