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student_system_final/dao/teacher_dao.py

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+# dao/teache_dao.py
+# 本文件封装对老师表的所有数据库操作（增、删、改、查）
+from fastapi import HTTPException
+from sqlalchemy.orm import Session
+
+from model.teacher import Teacher
+from scheme.teachers import TeacherCreate, TeacherUpdate
+
+
+class TeacherDAO:
+
+    # 多条件查询老师列表
+    @staticmethod
+    def get_list(db: Session, teacher_name=None, is_headteacher=None, page=1, size=10):
+        query = db.query(Teacher).filter(Teacher.flag == 1)
+        if teacher_name:
+            query = query.filter(Teacher.teacher_name.like(f"%{teacher_name}%"))
+        if is_headteacher:
+            query = query.filter(Teacher.is_headteacher == is_headteacher)
+        total = query.count()
+        items = (query.order_by(Teacher.teacher_id).offset((page - 1) * size).limit(size).all())
+        return total, items
+
+    # 按老师编号查单个老师
+    @staticmethod
+    def get_by_id(db: Session, teacher_id: int):
+        teacher = db.query(Teacher).filter(Teacher.teacher_id == teacher_id, Teacher.flag == 1).first()
+        if not teacher:
+            raise HTTPException(status_code=404, detail=f"老师 {teacher_id} 不存在")
+        return teacher
+
+    # 新增老师
+    @staticmethod
+    def create(db: Session, data: TeacherCreate):
+        teacher = Teacher(**data.model_dump())
+        teacher.flag = 1
+        db.add(teacher)
+        db.commit()
+        db.refresh(teacher)
+        return teacher
+
+    # 更新老师信息
+    @staticmethod
+    def update(db: Session, teacher_id: int, data: TeacherUpdate):
+        update_data = data.model_dump(exclude_unset=True)
+        db.query(Teacher) \
+            .filter(Teacher.teacher_id == teacher_id) \
+            .update(update_data)
+        db.commit()
+        return TeacherDAO.get_by_id(db, teacher_id)
+
+    # 逻辑删除老师
+    @staticmethod
+    def delete(db: Session, teacher_id: int):
+        teacher = TeacherDAO.get_by_id(db, teacher_id)
+        teacher.flag = 0
+        db.commit()
+        db.refresh(teacher)
+        return teacher