123 lines
3.8 KiB
Python
123 lines
3.8 KiB
Python
# dao/cls_mgmt_dao.py
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# 本文件封装对 ClsMgmt 表的所有数据库操作（增、删、改、查）
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from sqlalchemy.orm import Session
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from model.cls_mgmt_model import ClsMgmt
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from scheme.cls_mgmt_scheme import ClsMgmtResponse, ClsMgmtCreate
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from typing import Optional, List
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class ClsMgmtDAO:
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"""用户数据访问对象，所有方法均为静态方法，方便调用"""
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@staticmethod
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def get_all(db: Session, skip: int = 0, limit: int = 100):
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"""
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获取所有班级（支持分页）
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:param db: 数据库会话
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:param skip: 偏移量（跳过前 skip 条）
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:param limit: 最大返回条数
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:return: 用户对象列表
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"""
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return db.query(ClsMgmt).offset(skip).limit(limit).all()
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# -> Optional[ClsMgmt]
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# @staticmethod
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# def get_by_id(db: Session, class_id: str) :
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# """
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# 根据主键 ID 获取单个班级
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# :return: 用户对象或 None
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# """
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# return db.query(ClsMgmt).filter(ClsMgmt.id == class_id).first()
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@staticmethod
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def get_by_id(db: Session, class_id: str) -> Optional[ClsMgmt]:
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"""
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根据主键 ID 获取单个班级
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:return: 班级对象或 None
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"""
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return db.query(ClsMgmt).filter(ClsMgmt.id == class_id).first()
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@staticmethod
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def generate_class_id(cls_start_date) -> str:
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"""
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根据开课时间生成班级id
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规则：取年后两位 + 月 + 日，共6位数字
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例如：date(2026, 8, 14) → "260814"
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"""
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# strftime("%Y%m%d") → "20260814"，取后6位 → "260814"
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return cls_start_date.strftime("%Y%m%d")[-6:]
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@staticmethod
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def exists(db: Session, class_id: str) -> bool:
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"""
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根据班级id检查是否已存在
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"""
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existing = db.query(ClsMgmt).filter(
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ClsMgmt.id == class_id,
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ClsMgmt.is_deleted == 0
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).first()
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return existing is not None
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@staticmethod
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def create(db: Session, cls_data: "ClsMgmtCreate") -> "ClsMgmt":
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"""
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新增班级
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id 根据开课时间自动生成，不再自增
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"""
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class_id = ClsMgmtDAO.generate_class_id(cls_data.cls_start_date)
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new_cls = ClsMgmt(
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id=class_id, # 手动赋值班级id
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cls_start_date=cls_data.cls_start_date,
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head_tea_id=cls_data.head_tea_id,
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lecturer_id=cls_data.lecturer_id,
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is_deleted=0,
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# 如果 created_at / updated_at 没有默认值，取消注释：
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# created_at=datetime.now(),
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# updated_at=datetime.now(),
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)
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db.add(new_cls)
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db.commit()
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db.refresh(new_cls)
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return new_cls
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@staticmethod
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def delete_class(db: Session, class_id: str):
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"""
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删除班级（软删除）
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不真正删除数据，而是将 is_deleted 标记为 1
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"""
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del_cls = db.query(ClsMgmt).filter(
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ClsMgmt.id == class_id,
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ClsMgmt.is_deleted == 0 # 只查未删除的
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).first()
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if del_cls:
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del_cls.is_deleted = 1 # ← 关键：软删除，标记为已删除
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db.commit()
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return f"班级{class_id}删除成功"
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return f"班级{class_id}不存在"
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@staticmethod
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def update_cls(db: Session, cls_data, class_id: str):
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"""
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修改班级班主任和授课老师信息
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"""
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update_cls = db.query(ClsMgmt).filter(
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ClsMgmt.id == class_id,
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ClsMgmt.is_deleted == 0 # 只查未删除的
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).first()
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if update_cls:
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update_cls.head_tea_id=cls_data.head_tea_id
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update_cls.lecturer_id=cls_data.lecturer_id
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db.commit()
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return update_cls
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return f"班级{class_id}不存在"
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