66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
# -*- coding: utf-8 -*-
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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 json
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import uuid
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from sqlalchemy.dialects import mysql
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from sqlalchemy.types import String
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from sqlalchemy.types import Text
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from sqlalchemy.types import TypeDecorator
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class Json(TypeDecorator):
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impl = Text
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def load_dialect_impl(self, dialect):
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if dialect.name == 'mysql':
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return dialect.type_descriptor(mysql.LONGTEXT())
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else:
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return self.impl
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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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class Uuid(TypeDecorator):
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impl = String(36)
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def process_bind_param(self, value, dialect):
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if value is not None:
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try:
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uuid.UUID(value, version=4)
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except ValueError:
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raise ValueError(
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"Invalid format. It should be in UUID v4 format")
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return value
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def process_result_value(self, value, dialect):
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return value
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class LongText(TypeDecorator):
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impl = Text
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def load_dialect_impl(self, dialect):
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if dialect.name == 'mysql':
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return dialect.type_descriptor(mysql.LONGTEXT())
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else:
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return self.impl
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