Changed OrderGo to accept order codes prepended with the event slug

src/pretix/control/templates/pretixcontrol/orders/index.html

@@ -7,7 +7,7 @@
         <form class="form-inline" style="display: inline;"
               action="{% url "control:event.orders.go" event=request.event.slug organizer=request.event.organizer.slug %}">
             <div class="input-group">
-                <input type="text" name="code" class="form-control" maxlength="8" placeholder="{% trans "Order code" %}">
+                <input type="text" name="code" class="form-control" placeholder="{% trans "Order code" %}">
                 <span class="input-group-btn">
                     <button class="btn btn-primary" type="submit">{% trans "Go!" %}</button>
                 </span>

src/pretix/control/views/orders.py

@@ -304,6 +304,8 @@ class OrderGo(EventPermissionRequiredMixin, View):
     def get(self, request, *args, **kwargs):
         code = request.GET.get("code")
         try:
+            if code.startswith(request.event.slug):
+                code = code[len(request.event.slug):]
             order = Order.objects.current.get(code=code, event=request.event)
             return redirect('control:event.order', event=request.event.slug, organizer=request.event.organizer.slug,
                             code=order.code)