133 lines
3.5 KiB
Python
133 lines
3.5 KiB
Python
# 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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from oslo_serialization import jsonutils
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from oslo_utils import timeutils
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import pytz
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from sqlalchemy.dialects import mysql
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from sqlalchemy.ext import mutable
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from sqlalchemy import types
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class MutableList(mutable.Mutable, list):
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@classmethod
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def coerce(cls, key, value):
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if not isinstance(value, MutableList):
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if isinstance(value, list):
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return MutableList(value)
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return mutable.Mutable.coerce(key, value)
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else:
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return value
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def __init__(self, initval=None):
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list.__init__(self, initval or [])
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def __getitem__(self, key):
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value = list.__getitem__(self, key)
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for obj, key in self._parents.items():
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value._parents[obj] = key
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return value
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def __setitem__(self, key, value):
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list.__setitem__(self, key, value)
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self.changed()
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def __getstate__(self):
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return list(self)
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def __setstate__(self, state):
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self[:] = state
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def append(self, value):
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list.append(self, value)
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self.changed()
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def extend(self, iterable):
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list.extend(self, iterable)
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self.changed()
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def insert(self, index, item):
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list.insert(self, index, item)
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self.changed()
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def __setslice__(self, i, j, other):
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list.__setslice__(self, i, j, other)
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self.changed()
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def pop(self, index=-1):
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item = list.pop(self, index)
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self.changed()
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return item
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def remove(self, value):
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list.remove(self, value)
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self.changed()
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class Dict(types.TypeDecorator):
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impl = types.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 jsonutils.dumps(value)
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def process_result_value(self, value, dialect):
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if value is None:
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return None
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return jsonutils.loads(value)
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class List(types.TypeDecorator):
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impl = types.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 jsonutils.dumps(value)
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def process_result_value(self, value, dialect):
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if value is None:
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return None
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return jsonutils.loads(value)
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class TZAwareDateTime(types.TypeDecorator):
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"""A DB type that is time zone aware."""
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impl = types.DateTime
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def process_bind_param(self, value, dialect):
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if value is None:
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return None
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if dialect.name == 'mysql':
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return timeutils.normalize_time(value)
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return value
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def process_result_value(self, value, dialect):
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if value is None:
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return None
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return value.replace(tzinfo=pytz.utc)
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mutable.MutableDict.associate_with(Dict)
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MutableList.associate_with(List)
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