From aefa92d986fd36d866da76c75e20db4b607cb199 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Sat, 24 Sep 2016 13:28:01 +0200
Subject: [PATCH] Fix #249 -- Blacklist some exceptions for celeries error
 reporting

---
 src/pretix/celery.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/pretix/celery.py b/src/pretix/celery.py
index 58b28df29..2f4990f21 100644
--- a/src/pretix/celery.py
+++ b/src/pretix/celery.py
@@ -1,6 +1,7 @@
 import os
 
 from celery import Celery
+from celery.utils.mail import ErrorMail
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pretix.settings")
 
@@ -8,5 +9,21 @@ from django.conf import settings
 
 app = Celery('pretix')
 
+
+class MyErrorMail(ErrorMail):
+
+    def should_send(self, context, exc):
+        from pretix.base.services.orders import OrderError
+        from pretix.base.services.cart import CartError
+
+        blacklist = (OrderError, CartError)
+        return not isinstance(exc, blacklist)
+
+
 app.config_from_object('django.conf:settings')
+app.conf.CELERY_ANNOTATIONS = {
+    '*': {
+        'ErrorMail': MyErrorMail,
+    }
+}
 app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)