基础框架搭建完成，外键未连接

dao/class_management_dao.py

@@ -0,0 +1,64 @@
+from model.class_management_model import ClassInfo
+from sqlalchemy.orm import sessionmaker,Session
+from schema.class_management_request import ClassCreate, ClassUpdate
+
+#查询
+def get_class_dao(c,db):
+    q = db.query(ClassInfo)
+    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 c1:
+        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,db):
+    try:
+        c1 = ClassInfo(**c)
+        db.add(c1)
+    except:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return True
+
+#修改
+def update_class_dao(cname,update_data,db):
+    try:
+        rows = db.query(ClassInfo).filter(ClassInfo.class_id == cname).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).delete()
+    except:
+        db.rollback()
+        rows = 0
+    else:
+        db.commit()
+    finally:
+        return rows