No DREF notification again to the already notified users

Author: szabozoltan69

dref/serializers.py

@@ -424,10 +424,15 @@ def create(self, validated_data):
             dref_assessment_report = super().create(validated_data)
             dref_assessment_report.needs_identified.clear()
             return dref_assessment_report
+        if 'users' in validated_data:
+            to = {u.email for u in validated_data['users']}
+        else:
+            to = None
         dref = super().create(validated_data)
-        transaction.on_commit(
-            lambda: send_dref_email.delay(dref.id, 'New')
-        )
+        if to:
+            transaction.on_commit(
+                lambda: send_dref_email.delay(dref.id, list(to), 'New')
+            )
         return dref
 
     def update(self, instance, validated_data):
@@ -458,10 +463,17 @@ def update(self, instance, validated_data):
             dref_assessment_report = super().update(instance, validated_data)
             dref_assessment_report.needs_identified.clear()
             return dref_assessment_report
+        # we don't send notification again to the already notified users:
+        if 'users' in validated_data:
+            to = {u.email for u in validated_data['users']
+                  if u.email not in {t.email for t in instance.users.iterator()}}
+        else:
+            to = None
         dref = super().update(instance, validated_data)
-        transaction.on_commit(
-            lambda: send_dref_email.delay(dref.id, 'Updated')
-        )
+        if to:
+            transaction.on_commit(
+                lambda: send_dref_email.delay(dref.id, list(to), 'Updated')
+            )
         return dref
 
 

dref/tasks.py

@@ -6,15 +6,14 @@
 
 
 @shared_task
-def send_dref_email(dref_id, new_or_updated=''):
-    instance = Dref.objects.get(id=dref_id)
-    email_context = get_email_context(instance)
-    users_emails = [t.email for t in instance.users.iterator()]
-    if users_emails:
+def send_dref_email(dref_id, users_emails, new_or_updated=''):
+    if dref_id and users_emails:
+        instance = Dref.objects.get(id=dref_id)
+        email_context = get_email_context(instance)
         send_notification(
             f'{new_or_updated} DREF: {instance.title}',
             users_emails,
             render_to_string('email/dref/dref.html', email_context),
             f'{new_or_updated} DREF'
         )
-    return email_context
+        return email_context