from sqlalchemy.orm import Session

from app.models.user import Subject

DEFAULT_SUBJECTS = [
    "语文",
    "数学",
    "英语",
    "物理",
    "化学",
    "生物",
    "历史",
    "地理",
    "政治",
]


def seed_subjects(db: Session) -> None:
    existing = {s.name for s in db.query(Subject).all()}
    for name in DEFAULT_SUBJECTS:
        if name not in existing:
            db.add(Subject(name=name))
    db.commit()