# models.py
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    role = db.Column(db.String(20), nullable=False)  # 角色字段，例如 '指挥者' 或 '成员'