user model upgrade, rating, notificaiton

orm/notification.py

@@ -0,0 +1,17 @@
+from sqlalchemy import Column, Integer, String, ForeignKey, JSON as JSONType
+from orm.base import Base
+
+class Notification(Base):
+	__tablename__ = 'notification'
+
+	kind: str = Column(String, primary_key = True)
+	template: str = Column(String, nullable = False)
+	variables: JSONType = Column(JSONType, nullable = True) # [ <var1>, .. ]
+
+class UserNotification(Base):
+	__tablename__ = 'user_notification'
+
+	id: int = Column(Integer, primary_key = True)
+	user: int = Column(ForeignKey("user.id"))
+	kind: int = Column(ForeignKey("notification.kind"), nullable = False)
+	values: JSONType = Column(JSONType, nullable = True) # [ <var1>, .. ]