加了带班信息查询，查询老师list表优化

api/wl_teacher_api.py

@@ -8,7 +8,7 @@ from dao.wl_teacher_dao import (
     list_teachers,
     update_teacher,
     delete_teacher_logic,
-    generate_teacher_no,
+    generate_teacher_no, get_teacher_class_info,
 )
 from database import get_db
 from scheme.wl_teacher_scheme import (
@@ -75,4 +75,21 @@ def edit_teacher(
 # 逻辑删除教师
 @router.delete("/{t_id}")
 def remove_teacher(t_id: int, db: Session = Depends(get_db)):
-    return delete_teacher_logic(db, t_id)
+    teacher = delete_teacher_logic(db, t_id)
+    if not teacher:
+        raise HTTPException(status_code=404, detail="老师不存在")
+    return {"msg": "删除成功"}
+
+
+# 查询老师所带的班级ID
+@router.get("/{t_id}/class")
+def get_class_by_t_id(t_id: int, db: Session = Depends(get_db)):
+    """
+    根据老师ID查询其负责的班级ID
+    """
+    class_id = get_teacher_class_info(db, t_id)
+    if class_id is None:
+        # 如果返回 None，说明老师不存在或者没有分配班级
+        raise HTTPException(status_code=404, detail="老师不存在或未分配班级")
+
+    return {"class_id": class_id}

dao/wl_teacher_dao.py

@@ -11,16 +11,23 @@ def generate_teacher_no():
     seq = random.randint(1, 999)
     return f"T{date_str}{seq:03d}"
 
-def list_teachers(db: Session):
-    """查询全部未删除教师列表"""
-    return db.query(Teacher).filter(Teacher.is_deleted == 0).order_by(Teacher.t_id.desc()).all()
+def list_teachers(db: Session, page: int = 1, page_size: int = 10):
+    skip = (page - 1) * page_size
+    return (db.query(Teacher)
+            .filter(Teacher.is_deleted == 0)
+            .order_by(Teacher.t_id.desc())
+            .offset(skip)
+            .limit(page_size)
+            .all())
 
 def get_teacher_id(db: Session, t_id: int):
-    return (db.query(Teacher).filter(Teacher.t_id == t_id, Teacher.is_deleted == 0)
+    return (db.query(Teacher)
+            .filter(Teacher.t_id == t_id, Teacher.is_deleted == 0)
             .first() )
 
 def get_teacher_no(db:Session, t_no: str):
-    return(db.query(Teacher).filter(Teacher.t_no == t_no,Teacher.is_deleted == 0)
+    return(db.query(Teacher).
+           filter(Teacher.t_no == t_no,Teacher.is_deleted == 0)
            .first())
 
 
@@ -63,3 +70,9 @@ def delete_teacher_logic(db: Session, t_id: int):
     db_obj.is_deleted = 1
     db.commit()
     return db_obj
+
+def get_teacher_class_info(db: Session, t_id: int):
+    teacher = get_teacher_id(db, t_id)
+    if teacher:
+        return teacher.class_id
+    return None

model/wl_teacher_model.py

@@ -9,7 +9,7 @@ class Teacher(Base):
     t_phone = Column(String(20), unique=True, nullable=True)
     t_email = Column(String(20), unique=False)
     #创建老师时必须指定一个存在的班级
-    class_id = Column(Integer, ForeignKey("class_info.class_id"), nullable=False)
+    class_id = Column(Integer, ForeignKey("class_info.class_id"), nullable=True)
     role = Column(String(50), nullable=False)
     is_deleted = Column(Integer, default=0)