Tulir Asokan
60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
# -*- coding: future_fstrings -*-
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# mautrix-telegram - A Matrix-Telegram puppeting bridge
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# Copyright (C) 2018 Tulir Asokan
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from abc import abstractmethod
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from sqlalchemy import Table
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from sqlalchemy.engine.base import Engine
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from sqlalchemy.engine.result import RowProxy
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from sqlalchemy.sql.base import ImmutableColumnCollection
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from sqlalchemy.ext.declarative import declarative_base
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class BaseBase:
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db = None # type: Engine
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t = None # type: Table
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__table__ = None # type: Table
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c = None # type: ImmutableColumnCollection
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@classmethod
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@abstractmethod
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def _one_or_none(cls, rows: RowProxy):
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pass
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@classmethod
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def _select_one_or_none(cls, *args):
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return cls._one_or_none(cls.db.execute(cls.t.select().where(*args)))
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@property
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@abstractmethod
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def _edit_identity(self):
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pass
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def update(self, **values) -> None:
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with self.db.begin() as conn:
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conn.execute(self.t.update()
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.where(self._edit_identity)
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.values(**values))
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for key, value in values.items():
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setattr(self, key, value)
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def delete(self) -> None:
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with self.db.begin() as conn:
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conn.execute(self.t.delete().where(self._edit_identity))
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Base = declarative_base(cls=BaseBase)
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