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41 lines
768 B
Python
41 lines
768 B
Python
from __future__ import annotations
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import typing
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import abc
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from ..core import app
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preregistered_db_migrations: list[typing.Type[DBMigration]] = []
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def migration_class(number: int):
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"""Migration class decorator"""
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def wrapper(cls: typing.Type[DBMigration]) -> typing.Type[DBMigration]:
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cls.number = number
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preregistered_db_migrations.append(cls)
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return cls
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return wrapper
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class DBMigration(abc.ABC):
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"""Database migration"""
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number: int
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"""Migration number"""
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def __init__(self, ap: app.Application):
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self.ap = ap
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@abc.abstractmethod
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async def upgrade(self):
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"""Upgrade"""
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pass
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@abc.abstractmethod
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async def downgrade(self):
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"""Downgrade"""
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pass
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