"""Who made an alert transition happen (#5463): an acknowledgement, or a rule
edit, disable or enable that reset the alert, records the person on its event.

Revision ID: 0040_alert_event_actor
Revises: 0039_password_resets
Create Date: 2026-10-09
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0040_alert_event_actor"
down_revision: Union[str, None] = "0039_password_resets"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column("alert_events", sa.Column(
        "actor_id", sa.String(36), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True))


def downgrade() -> None:
    op.drop_column("alert_events", "actor_id")