Reduce number of SQL queries on order detail page

src/pretix/control/views/orders.py

@@ -159,8 +159,7 @@ class OrderView(EventPermissionRequiredMixin, DetailView):
 
     def get_object(self, queryset=None):
         try:
-            return Order.objects.get(
+            return self.request.event.orders.get(
-                event=self.request.event,
                 code=self.kwargs['code'].upper()
             )
         except Order.DoesNotExist:
@@ -174,6 +173,8 @@ class OrderView(EventPermissionRequiredMixin, DetailView):
 
     @cached_property
     def order(self):
+        if hasattr(self, 'object') and self.object:
+            return self.object
         return self.get_object()
 
     def get_context_data(self, **kwargs):
@@ -274,6 +275,7 @@ class OrderDetail(OrderView):
                 p.item.questions.all()
             )
             p.cache_answers()
+            p.order = self.order
 
             positions.append(p)
 

src/pretix/plugins/badges/signals.py

@@ -99,7 +99,7 @@ def register_pdf(sender, **kwargs):
 
 
 def _cached_rendermap(event):
-    if hasattr(event, '_cached_rendermap'):
+    if hasattr(event, '_cached_renderermap'):
         return event._cached_renderermap
     renderermap = {
         bi.item_id: bi.layout_id