94 lines
3.3 KiB
Python
94 lines
3.3 KiB
Python
from sqlalchemy.orm import Session
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from model.wl_class_model import Class_
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from model.wl_student_model import Student
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from fastapi import HTTPException
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# 老师模块加入后解除注释
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# from model.teacher import WlTeacher
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# 1. 新增班级
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def create_class(db: Session, class_data: dict):
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new_class = Class_(**class_data)
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db.add(new_class)
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db.commit()
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db.refresh(new_class)
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return new_class
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# 2. 查询班级列表（你的亮点：查出了班主任和授课老师）
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def get_classes(db: Session, skip: int = 0, limit: int = 100):
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# 先查出所有没被删除的班级
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class_list = db.query(Class_).filter(Class_.is_deleted == 0).offset(skip).limit(limit).all()
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#下面的部分等导入老师模块后解除注释
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# # 循环每个班级，去老师表里找对应的老师
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# for c in class_list:
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# # 找班主任（role是"班主任"的第一个老师）
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# head_teacher = db.query(WlTeacher).filter(
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# WlTeacher.class_id == c.class_id,
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# WlTeacher.role == "班主任"
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# ).first()
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#
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# # 找授课老师（可能有多个，用逗号拼起来）
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# course_teachers = db.query(WlTeacher).filter(
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# WlTeacher.class_id == c.class_id,
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# WlTeacher.role == "任课"
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# ).all()
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#
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# # 把查到的名字塞给班级对象，方便传给前端
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# c.head_teacher_name = head_teacher.t_name if head_teacher else "暂无"
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# # 下面这两行是初学者常用的拼接字符串写法
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# if course_teachers:
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# names = []
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# for t in course_teachers:
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# names.append(t.t_name)
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# c.course_teacher_names = "，".join(names)
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# else:
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# c.course_teacher_names = "暂无"
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return class_list
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# 3. 根据ID查班级
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def get_class_by_id(db: Session, class_id: int):
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return db.query(Class_).filter(Class_.class_id == class_id, Class_.is_deleted == 0).first()
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# 4. 修改班级信息
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def update_class(db: Session, class_id: int, class_data: dict):
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db_class = get_class_by_id(db, class_id)
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if not db_class:
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return None
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# 前端传了什么，就改什么（防止把没传的字段改成空值）
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for key, value in class_data.items():
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setattr(db_class, key, value)
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db.commit()
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db.refresh(db_class)
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return db_class
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# 5. 逻辑删除班级（你的亮点：安全检查）
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def delete_class(db: Session, class_id: int):
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db_class = get_class_by_id(db, class_id)
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if not db_class:
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return {"code": 404, "msg": "班级不存在"}
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# 检查1：班里还有学生吗？（只要有1个，就不给删）
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student = db.query(Student).filter(
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Student.class_id == class_id,
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Student.is_deleted == 0
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).first()
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if student:
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raise HTTPException(status_code=400, detail="该班级还有学生，不能删除！")
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#导入老师模块后解除注释
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# 检查2：班里还有老师吗？
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# teacher = db.query(WlTeacher).filter(WlTeacher.class_id == class_id).first()
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# if teacher:
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# return {"code": 400, "msg": "该班级还有老师，不能删除！"}
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# 检查通过，开始逻辑删除（贴个已删除标签）
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db_class.is_deleted = 1
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db.commit()
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return {"code": 200, "msg": "班级删除成功"} |