Merge branch 'bugfix/10-email-notif-created' into 'master'

bugfix: send email only when notif created #10

See merge request startinblox/djangoldp-packages/djangoldp-notifications!13

djangoldp_notification/models.py

@@ -74,8 +74,8 @@ def send_request(target, object_iri):
 
 
 @receiver(post_save, sender=Notification)
-def send_email_on_notification(sender, instance, **kwargs):
-    if instance.summary and settings.JABBER_DEFAULT_HOST and instance.user.email:
+def send_email_on_notification(sender, instance, created, **kwargs):
+    if created and instance.summary and settings.JABBER_DEFAULT_HOST and instance.user.email:
         html_message = loader.render_to_string(
             'email.html',
             {