def serialize_job_assignment(row, names=None) -> dict:
    names = names or {}
    user_key = str(row.user_id) if row.user_id else None
    by_key = str(row.assigned_by) if row.assigned_by else None
    return {
        "id": str(row.id),
        "job_post_id": str(row.job_post_id) if row.job_post_id else None,
        "user_id": user_key,
        "user_name": names.get(user_key) if user_key else None,
        "assignment_role": row.assignment_role,
        "valid_from": row.valid_from.isoformat() if row.valid_from else None,
        "valid_to": row.valid_to.isoformat() if row.valid_to else None,
        "assigned_by": by_key,
        "assigned_by_name": names.get(by_key) if by_key else None,
        "created_at": row.created_at.isoformat() if row.created_at else None,
    }


def serialize_application_assignment(row, names=None) -> dict:
    names = names or {}
    user_key = str(row.user_id) if row.user_id else None
    by_key = str(row.assigned_by) if row.assigned_by else None
    return {
        "id": str(row.id),
        "inbox_id": row.inbox_id,
        "user_id": user_key,
        "user_name": names.get(user_key) if user_key else None,
        "assignment_role": row.assignment_role,
        "valid_from": row.valid_from.isoformat() if row.valid_from else None,
        "valid_to": row.valid_to.isoformat() if row.valid_to else None,
        "assigned_by": by_key,
        "assigned_by_name": names.get(by_key) if by_key else None,
        "created_at": row.created_at.isoformat() if row.created_at else None,
    }