From 85edbe48376047142ceb7e85c4aba1fe70e1bab7 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Thu, 18 Jul 2019 17:26:34 +0200
Subject: [PATCH] Improved device validation

---
 src/pretix/control/forms/organizer.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/pretix/control/forms/organizer.py b/src/pretix/control/forms/organizer.py
index 118af4eefb..a427c6f7de 100644
--- a/src/pretix/control/forms/organizer.py
+++ b/src/pretix/control/forms/organizer.py
@@ -173,6 +173,13 @@ class DeviceForm(forms.ModelForm):
         super().__init__(*args, **kwargs)
         self.fields['limit_events'].queryset = organizer.events.all()
 
+    def clean(self):
+        d = super().clean()
+        if not d['all_events'] and not d['limit_events']:
+            raise ValidationError(_('Your device will not have access to anything, please select some events.'))
+
+        return d
+
     class Meta:
         model = Device
         fields = ['name', 'all_events', 'limit_events']