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from sqlalchemy import Column, Integer, String, ForeignKey, DateTime
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from sqlalchemy.orm import relationship
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from datetime import datetime, timezone
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from .room_management import Room, Base # 假设room_management.py在同一包内，或根据实际情况调整导入路径
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# 预订模型
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class Booking(Base):
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__tablename__ = 'bookings' # 注意双下划线的正确使用
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id = Column(Integer, primary_key=True)
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room_id = Column(Integer, ForeignKey('rooms.id'), nullable=False)
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guest_name = Column(String, nullable=False)
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start_date = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc)) # 使用时区感知的默认值
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end_date = Column(DateTime, nullable=False)
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room = relationship("Room", back_populates="bookings")
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def __repr__(self):
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return f"Booking(id={self.id}, room={self.room.room_number}, guest='{self.guest_name}', start_date={self.start_date}, end_date={self.end_date})"
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# 初始化Room模型与Booking之间的关系
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Room.bookings = relationship("Booking", order_by=Booking.id, back_populates="room")
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def make_booking(room_number, guest_name, start_date_str, end_date_str):
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"""创建预订"""
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from dateutil.parser import parse
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try:
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start_date = parse(start_date_str).replace(tzinfo=None)
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end_date = parse(end_date_str).replace(tzinfo=None)
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room = session.query(Room).filter_by(room_number=room_number, status='available').first()
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if not room:
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return "该房间不可用或不存在。"
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new_booking = Booking(guest_name=guest_name, start_date=start_date, end_date=end_date, room=room)
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room.status = 'occupied'
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session.add(new_booking)
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session.commit()
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return f"{guest_name} 的预订成功，房间号：{room_number}，时间：{start_date} 至 {end_date}"
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except Exception as e:
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return str(e)
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def cancel_booking(booking_id):
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"""取消预订"""
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booking = session.query(Booking).get(booking_id)
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if not booking:
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return "预订记录不存在。"
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room = booking.room
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room.status = 'available'
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session.delete(booking)
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session.commit()
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return f"预订ID为{booking_id}的预订已取消。"
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def get_bookings_by_guest(guest_name=None):
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"""按客人姓名获取预订记录"""
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query = session.query(Booking)
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if guest_name:
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query = query.filter_by(guest_name=guest_name)
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return query.all()
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def get_bookings_by_room(room_number):
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"""按房间号获取预订记录"""
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room = session.query(Room).filter_by(room_number=room_number).first()
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if not room:
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return []
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return room.bookings
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