Attach qrcode as attachment

vendor/regidesk/regidesk/views.py

@@ -1,6 +1,7 @@
 import base64
 import logging
 from datetime import datetime
+from email.mime.image import MIMEImage
 
 from django.core.exceptions import ValidationError
 from django.core.mail import EmailMultiAlternatives
@@ -169,7 +170,7 @@ def boarding_send(request):
             "user": user,
             "checkin": user.checkin,
             "code": user.checkin.code,
-            "qrcode": user.checkin.qrcode,
+            "qrcode": '<img src="cid:qrcode.png"/>',
             "qrcode_url": request.build_absolute_uri(
                 reverse("regidesk:checkin_png", args=[user.checkin.code])),
         }
@@ -188,29 +189,34 @@ def boarding_send(request):
                              html_body=html_body
         )
         bpass.save()
+
         if user.checkin.boardingpass:
             user.checkin.boardingpass.delete()
         user.checkin.boardingpass = bpass
         user.checkin.save()
 
-        with transaction.atomic():
+        msg = EmailMultiAlternatives(
+            bpass.subject,
+            bpass.body,
+            bpass.from_address,
+            [bpass.to_address,],
+        )
+        msg.content_subtype="html"
+        msg.mixed_subtype="related"
+        if bpass.html_body:
+            msg.attach_alternative(bpass.html_body, "text/html")
 
-            msg = EmailMultiAlternatives(
-                bpass.subject,
-                bpass.body,
-                bpass.from_address,
-                [bpass.to_address,],
-            )
-            if bpass.html_body:
-                msg.attach_alternative(bpass.html_body, "text/html")
+        qrcode_image = MIMEImage(base64.b64decode(user.checkin.qrcode))
+        qrcode_image.add_header('Content-ID', '<qrcode.png>')
+        msg.attach(qrcode_image)
 
-            if user in boarding_users:
+        if user in boarding_users:
+            with transaction.atomic():
                 msg.send()
-
                 bpass.sent = datetime.now()
                 bpass.save()
                 messages.success(request, "Sent boarding pass to %s" % attendee)
 
-            request.session['boarding_attendees'].remove(attendee.pk)
+        request.session['boarding_attendees'].remove(attendee.pk)
 
     return redirect("regidesk:boarding_overview")