"""make print_jobs.printer_id nullable — printer is assigned at job start

Revision ID: 0005
Revises: 0004
Create Date: 2026-06-18

"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0005"
down_revision: Union[str, None] = "0004"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.alter_column("print_jobs", "printer_id",
                    existing_type=sa.Integer(),
                    nullable=True)


def downgrade() -> None:
    op.alter_column("print_jobs", "printer_id",
                    existing_type=sa.Integer(),
                    nullable=False)