from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

# 导入所有模型
from app.models.user import User
from app.models.student import Student
from app.models.attendance import WeeklyAttendance, DailyAttendanceDetail, LeaveRecord

__all__ = ['db', 'User', 'Student', 'WeeklyAttendance', 'DailyAttendanceDetail', 'LeaveRecord']