UPD: improved email templates.

dav_events/workflow.py

@@ -1,9 +1,12 @@
+import logging
 from django.apps import apps
 
 from . import emails
 
+logger = logging.getLogger(__name__)
 
-def email_event_update(sender, **kwargs):
+
+def send_emails_on_event_update(sender, **kwargs):
     event = kwargs.get('event')
     diff = kwargs.get('diff')
     updater = kwargs.get('user')
@@ -12,6 +15,11 @@ def email_event_update(sender, **kwargs):
     if not app_config.settings.enable_email_notifications:
         return
 
+    if len(diff) < 1:
+        logger.debug('send_emails_on_event_update(): No diff data -> Skip sending mails.')
+        return
+    diff_text = '\n'.join(diff[3:])
+
     # Who should be informed about the update?
     recipients = [event.owner]
     if event.is_flagged('submitted'):
@@ -25,11 +33,11 @@ def email_event_update(sender, **kwargs):
 
     for recipient in recipients:
         if recipient.email and recipient.email != updater.email:
-            email = emails.EventUpdatedMail(recipient=recipient, event=event, editor=updater, diff=diff)
+            email = emails.EventUpdatedMail(recipient=recipient, event=event, editor=updater, diff=diff_text)
             email.send()
 
 
-def email_event_status_update(sender, **kwargs):
+def send_emails_on_event_status_update(sender, **kwargs):
     event = kwargs.get('event')
     flag = kwargs.get('flag')
     updator = flag.user