models: augment NotificationManager.notify() to also notify delegates recursively, fixes #3635

docbow_project/docbow/models.py

@@ -23,6 +23,7 @@ import timestamp
 from .validators import validate_phone
 from .utils import file_match_mime_types
 from . import app_settings
+from . import utils
 
 DOCBOW_APP = _('docbow')
 DOCBOW_APP = _('Docbow_App')
@@ -729,6 +730,8 @@ class DocbowProfile(Model):
 class NotificationManager(Manager):
     def notify(self, document=None, users=None, kind='new-document', ctx=None):
         '''Build notifications in bulk'''
+        users = utils.queryset_fixpoint(users, 
+                lambda s: User.objects.filter(delegations_by__by__in=s))
         notifications = [Notification(user=user, document=document, kind=kind, ctx=ctx)
                 for user in users]
         self.bulk_create(notifications)

docbow_project/docbow/utils.py

@@ -73,4 +73,12 @@ def date_to_aware_datetime(date):
             datetime.datetime(date.year, date.month, date.day),
             timezone.get_current_timezone())
 
-
+def queryset_fixpoint(initial, qs_function):
+    initial = set(initial)
+    count = len(initial)
+    while True:
+        initial |= set(qs_function(initial))
+        if len(initial) == count:
+            break
+        count = len(initial)
+    return initial