班级模块

dao/class_dao.py

@@ -0,0 +1,54 @@
+from model.class_model import Class_info
+
+def add_class_dao(o,db):
+    try:
+        o1 = Class_info( **o)  # 将字典解析成键值对关键字参数输入 title = xxx, userid = XXX
+        db.add(o1)
+    except:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return True
+
+def update_class_dao(class_id,update_data,db):
+    try: # 数据更新是有返回值的，返回的是影响的行数
+        rows = db.query( Class_info ).filter( Class_info.class_id == class_id ).update( update_data )
+    except:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return rows
+
+
+def get_class_dao(class_name,db):
+    try:
+        rows = db.query(Class_info).filter(Class_info.class_name == class_name).filter(Class_info.is_deleted==0).all()
+    except:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return rows
+
+
+
+class Student_delect_Dao:
+ @staticmethod
+ def soft_delete_student(db, class_id: str):
+        # 先查询is_deleted为0的有效学生数据
+        query = db.query(Class_info).where(
+            Class_info.class_id == class_id,
+            Class_info.is_deleted == 0
+        )
+        result = db.execute(query)
+        target_student = result.scalar_one_or_none()
+        return target_student
+
+
+
+
+
+
+