Function downgrade

tortoise/cli/cli.py:574–600

(
    ctx: CLIContext,
    app_label: str | None,
    migration: str | None,
    fake: bool,
    dry_run: bool,
)

async def downgrade(
    ctx: CLIContext,
    app_label: str | None,
    migration: str | None,
    fake: bool,
    dry_run: bool,
) -> None:
    if not app_label:
        config = _load_config(ctx)
        labels = sorted(config.apps) if config.apps else []
        available = ", ".join(labels) if labels else "(none)"
        raise utils.CLIUsageError(f"app_label is required. Available app labels: {available}")
    if not migration and "." in app_label:
        app_label, migration = app_label.split(".", 1)
    if migration:
        target = f"{app_label}.{migration}"
    else:
        target = f"{app_label}.__first__"
    await _run_migrate(
        ctx,
        app_label,
        migration,
        fake=fake,
        dry_run=dry_run,
        target_override=target,
        direction="backward",
    )


async def history(ctx: CLIContext, app_labels: tuple[str, ...]) -> None: