UPD: more cool participant admin stuff.

dav_base/validators.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from django.core.validators import RegexValidator
+from django.utils.translation import ugettext_lazy as _
+
+
+DAVNumberValidator = RegexValidator(r'^'
+                                    r'([0-9]{1,10}/[0-9]{2,10}/)?'
+                                    r'[0-9]{1,10}'
+                                    r'(\*[0-9]{1,10})?'
+                                    r'(\*[0-9]{4}\*[0-9]{4})?'
+                                    r'([* ][0-9]{8})?'
+                                    r'$',
+                                    _(u'Ungültiges Format.'))