Send a notification when a follow action happens

calsocial/models.py

@@ -24,6 +24,7 @@ from warnings import warn
 from flask_babelex import lazy_gettext
 from flask_security import UserMixin, RoleMixin
 from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm.exc import NoResultFound
 from sqlalchemy_utils.types.choice import ChoiceType
 
@@ -519,6 +520,11 @@ class Notification(db.Model):
 
         return item_class.query.get(self.item_id)
 
+    @item.setter
+    def item(self, value):
+        self.item_type = value.__class__.__name__
+        self.item_id = value.id
+
     @property
     def message(self):
         """Get the translated message for ``key``