Added multi-domain capabilities

src/pretix/multidomain/models.py

@@ -0,0 +1,27 @@
+from django.db import models
+from django.utils.translation import ugettext_lazy as _
+from versions.models import VersionedForeignKey
+
+from pretix.base.models import Organizer
+
+
+class KnownDomain(models.Model):
+    domainname = models.CharField(max_length=255, primary_key=True)
+    organizer = VersionedForeignKey(Organizer, blank=True, null=True, related_name='domains')
+
+    class Meta:
+        verbose_name = _("Known domain")
+        verbose_name_plural = _("Known domains")
+
+    def __str__(self):
+        return self.domainname
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        if self.organizer:
+            self.organizer.get_cache().clear()
+
+    def delete(self, *args, **kwargs):
+        if self.organizer:
+            self.organizer.get_cache().clear()
+        super().delete(*args, **kwargs)