wip(semantic):数据模型语义化

applications/models/base.py

@@ -0,0 +1,8 @@
+from datetime import datetime
+
+from applications.extensions import db
+
+
+class BaseModel(object):
+    create_at = db.Column(db.DateTime, default=datetime.now, comment='创建时间')
+    update_at = db.Column(db.DateTime, default=datetime.now, onupdate=datetime.now, comment='更新时间')