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# - *- coding: utf- 8 - *-
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import asyncio
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from logging.config import fileConfig
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from typing import Any, List, Optional
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from alembic import context
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from alembic.operations import ops
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from sqlalchemy import pool, text
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from sqlalchemy.engine import Connection
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from sqlalchemy.schema import DefaultClause
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from sqlalchemy.ext.asyncio import async_engine_from_config
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from tgbot.database.core import Base
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import tgbot.database # noqa: F401
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config = context.config
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if config.config_file_name is not None:
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fileConfig(config.config_file_name)
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target_metadata = Base.metadata
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INDEX_DIFF_NOISE = {"ix_storage_payments_id", "ix_storage_settings_id"}
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# Отбрасывание SQLite-шума из автогенерации
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def _filter_autogenerated_ops(container: Any) -> None:
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filtered_ops = []
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for operation in container.ops:
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if isinstance(operation, ops.AlterColumnOp):
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continue
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if _is_index_noise(operation):
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continue
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if isinstance(operation, ops.ModifyTableOps):
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_filter_autogenerated_ops(operation)
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if operation.ops:
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filtered_ops.append(operation)
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continue
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filtered_ops.append(operation)
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container.ops = filtered_ops
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# Подготовка новых колонок к безопасному SQLite ADD COLUMN
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def _prepare_sqlite_add_columns(container: Any) -> None:
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for operation in container.ops:
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if isinstance(operation, ops.AddColumnOp):
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_apply_server_default(operation.column)
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continue
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if isinstance(operation, ops.ModifyTableOps):
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_prepare_sqlite_add_columns(operation)
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# Перенос default модели в server_default миграции
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def _apply_server_default(column: Any) -> None:
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if column.nullable or column.server_default is not None or column.default is None:
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return
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default_value = _get_simple_default(column.default.arg)
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if default_value is None:
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return
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column.server_default = DefaultClause(text(default_value))
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# Получение SQL-литерала для простых default-значений
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def _get_simple_default(value: Any) -> Optional[str]:
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if callable(value):
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return None
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if isinstance(value, bool):
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return "1" if value else "0"
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if isinstance(value, (int, float)):
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return str(value)
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if isinstance(value, str):
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return repr(value)
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return None
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# Игнорирование индексов, которые SQLite отражает иначе
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def _is_index_noise(operation: Any) -> bool:
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if not isinstance(operation, (ops.CreateIndexOp, ops.DropIndexOp)):
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return False
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return getattr(operation, "index_name", "") in INDEX_DIFF_NOISE
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# Ограничение сравнения SQLite только реальными добавлениями/удалениями
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def _include_object(object_: Any, name: str, type_: str, reflected: bool, compare_to: Any) -> bool:
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if type_ == "column" and compare_to is not None:
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return False
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if type_ == "index" and name in INDEX_DIFF_NOISE:
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return False
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return True
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# Очистка автосозданной миграции перед записью
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def _process_revision_directives(_context: Any, _revision: Any, directives: List[Any]) -> None:
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if not directives:
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return
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script = directives[0]
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_prepare_sqlite_add_columns(script.upgrade_ops)
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_filter_autogenerated_ops(script.upgrade_ops)
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_filter_autogenerated_ops(script.downgrade_ops)
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if not script.upgrade_ops.ops and not script.downgrade_ops.ops:
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config.attributes["autogenerate_empty"] = True
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directives.clear()
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# Запуск миграций без подключения
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def run_migrations_offline() -> None:
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url = config.get_main_option("sqlalchemy.url")
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context.configure(
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url=url,
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target_metadata=target_metadata,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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render_as_batch=True,
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compare_type=False,
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include_object=_include_object,
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process_revision_directives=_process_revision_directives,
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)
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with context.begin_transaction():
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context.run_migrations()
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# Запуск миграций на соединении
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def do_run_migrations(connection: Connection) -> None:
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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render_as_batch=True,
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compare_type=False,
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include_object=_include_object,
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process_revision_directives=_process_revision_directives,
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)
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with context.begin_transaction():
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context.run_migrations()
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# Запуск миграций через async-engine
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async def run_async_migrations() -> None:
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connectable = async_engine_from_config(
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config.get_section(config.config_ini_section, {}),
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poolclass=pool.NullPool,
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)
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connection = connectable.connect()
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try:
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await connection.start()
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await connection.run_sync(do_run_migrations)
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finally:
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await connection.close()
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await connectable.dispose()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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external_connection = config.attributes.get("connection")
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if external_connection is not None:
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do_run_migrations(external_connection)
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else:
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asyncio.run(run_async_migrations())
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