Odesilani newsletteru po castech kvuli limitu API.

src/nalodeni/news.py

@@ -391,9 +391,17 @@ def msg_send(request, id, realSend=False):
         }
 
     if realSend:
+        def chunks(l, n):
+            """Yield successive n-sized chunks from l."""
+            for i in range(0, len(l), n):
+                yield l[i:i + n]
+
         from django.core.mail import get_connection, EmailMultiAlternatives
         import quopri
 
+        for recip_part in chunks(recipients_email, 500):
+            # process by part, MailGun API hsa a limit of 1000 messages
+
             mailgun_backend = get_connection('anymail.backends.mailgun.EmailBackend')
 
             header_from = '%s <%s>' % (
@@ -417,7 +425,7 @@ def msg_send(request, id, realSend=False):
                     eml = rcp.email
                 ema.to = [ eml ]
 
-        ema.bcc = recipients_email
+            ema.bcc = recip_part
             if obj.news.replyToEmail is not None:
                 try:
                     eml = obj.news.replyToEmail.strip()
@@ -433,6 +441,9 @@ def msg_send(request, id, realSend=False):
             ema.attach_alternative(html_message, "text/html")
             ema.send()
 
+            messages.info(request, "Zpráva odeslána %s uživatelům." % len(recip_part) )
+            # end of partial send
+
         if update_sent_ts:
             obj.sent_ts = datetime.now()
             obj.save()