From 284a1384b629ca0ce967347e6758362f831c0527 Mon Sep 17 00:00:00 2001
From: skrzepto <skrzepto@gmail.com>
Date: Jun 10 2016 14:12:51 +0000
Subject: when a hub is deleted, delete the association and also all its widgets are deleted as well. assumption is that a widget has one parent


---

diff --git a/hubs/models.py b/hubs/models.py
index 742b113..1731076 100755
--- a/hubs/models.py
+++ b/hubs/models.py
@@ -108,7 +108,7 @@ class Association(BASE):
     role = sa.Column(sa.Enum(*roles), primary_key=True)
 
     user = relation("User", backref=backref('associations', cascade="all, delete-orphan"))
-    hub = relation("Hub", backref="associations")
+    hub = relation("Hub", backref=backref('associations', cascade="all, delete-orphan"))
 
     @classmethod
     def get(cls, session, hub, user, role):
@@ -124,7 +124,8 @@ class Hub(BASE):
     name = sa.Column(sa.String(50), primary_key=True)
     summary = sa.Column(sa.String(128))
     created_on = sa.Column(sa.DateTime, default=datetime.datetime.utcnow)
-    widgets = relation('Widget', backref=backref('hub'))
+    widgets = relation('Widget', cascade='all,delete-orphan', single_parent=True,
+                       backref=backref('hub', cascade='all'))
     left_width = sa.Column(sa.Integer, nullable=False, default=8)
     archived = sa.Column(sa.Boolean, default=False)
     user_hub = sa.Column(sa.Boolean, default=False)