feat: 初始化学生管理系统代码

dao/classinfo_dao.py

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+from model.classinfo import ClassInfo
+from scheme.classinfo_scheme import ClassCreate, ClassUpdate
+
+# 增删改查
+def create_class(db,obj:ClassCreate):
+    new_class=ClassInfo(class_name=obj.class_name,start_time=obj.start_time,statu=1)
+    db.add(new_class)
+    db.commit()
+    db.refresh(new_class)
+    return new_class
+# 查询单个班级
+def get_class(db,class_id=None,class_name=None):
+    u1=db.query(ClassInfo).filter(ClassInfo.statu==1)
+    if class_id is not None:
+        u1=u1.filter(ClassInfo.id==class_id)
+    if class_name is not None:
+        u1=u1.filter(ClassInfo.class_name.like(f"%{class_name}%"))
+    if class_id is not None:
+        return u1.first()
+    else:
+        return u1.all()
+#  查询所有班级
+def get_all_class(db):
+    return db.query(ClassInfo).filter(ClassInfo.statu==1).all()
+# 修改班级`
+def update_class(db,class_id:int,obj:ClassUpdate):
+    u2=get_class(db,class_id)
+    if u2:
+        u2.class_name=obj.class_name
+        u2.start_time=obj.start_time
+        db.commit()
+        db.refresh(u2)
+        return u2
+    else:
+        return None
+# 删除班级
+def delete_class(db,class_id:int):
+    u3=get_class(db,class_id)
+    if u3:
+        u3.statu=0
+        db.commit()
+        db.refresh(u3)
+        return u3
+    else:
+        return None