重新新增项目架构文件。

class_management/dao/class_management_dao.py

@@ -0,0 +1,81 @@
+from model.class_management_model import ClassInfo
+from sqlalchemy.orm import Session
+
+
+#查询
+def get_class_dao(c:dict,db:Session) :
+    q = db.query(ClassInfo).filter(ClassInfo.is_delete == 0)#is_delete=0代表未删除
+    if c.get('class_id'):
+        q = q.filter(ClassInfo.class_id == c.get('class_id'))
+    if c.get('class_name'):
+        q = q.filter(ClassInfo.class_name == c.get('class_name'))
+    if c.get('class_teacher'):
+        q = q.filter(ClassInfo.class_teacher == c.get('class_teacher'))
+    if c.get('class_lecturer'):
+        q = q.filter(ClassInfo.class_lecturer == c.get('class_lecturer'))
+    if c.get('class_start_time'):
+        q = q.filter(ClassInfo.class_start_time == c.get('class_start_time'))
+    if c.get('class_end_time'):
+        q = q.filter(ClassInfo.class_end_time == c.get('class_end_time'))
+    c1 = q.all()
+    if not c1:
+        return []
+    return[
+        {'班级编号':i.class_id
+        ,'班级名称':i.class_name
+        ,'班主任':i.class_teacher
+        ,'授课老师':i.class_lecturer
+        ,'开课时间':i.class_start_time
+        ,'结课时间':i.class_end_time
+        } for i in c1
+            ]
+
+
+#新增
+def add_class_dao(c:dict,db:Session):
+    try:
+        exist_class = db.query(ClassInfo)\
+            .filter(ClassInfo.class_name == c['class_name']
+                    ,ClassInfo.is_delete == 0)\
+            .first()
+        if exist_class:
+            msg = '班级名称已存在'
+            print(msg)
+            return [False,msg]
+        c1 = ClassInfo(**c)
+        db.add(c1)
+    except:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return True
+
+#修改
+def update_class_dao(cid:int,update_data,db):
+    try:
+        rows = db.query(ClassInfo)\
+            .filter(ClassInfo.class_id == cid
+                    ,ClassInfo.is_delete==0)\
+            .update(update_data)
+    except:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return rows
+
+
+#删除
+def delete_class_dao(cid,db):
+    try:
+        rows = db.query(ClassInfo)\
+            .filter(ClassInfo.class_id == cid,ClassInfo.is_delete==0)\
+            .update({'is_delete':1})
+    except:
+        db.rollback()
+        rows = 0
+    else:
+        db.commit()
+    finally:
+        return rows