diff --git a/sigi/apps/utils/__init__.py b/sigi/apps/utils/__init__.py
new file mode 100644
index 0000000..2665d93
--- /dev/null
+++ b/sigi/apps/utils/__init__.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+from django.db import models
+from unicodedata import normalize
+
+class SearchField(models.TextField):
+    def pre_save(self, model_instance, add):
+        search_text = []
+        for field_name in self.field_names:
+            val = unicode(to_ascii(getattr(model_instance, field_name)))
+            search_text.append(val)
+        value = u' '.join(search_text)
+        setattr(model_instance, self.name, value)
+        return value
+    def __init__(self, field_names, *args, **kwargs):
+        self.field_names = field_names
+        kwargs['editable'] = False
+        super(self.__class__, self).__init__(*args, **kwargs)
+
+def to_ascii(txt, codif='utf-8'):
+    if not isinstance(txt, basestring):
+        txt = unicode(txt)
+    if isinstance(txt, unicode):
+        txt = txt.encode('utf-8')
+    return normalize('NFKD', txt.decode(codif)).encode('ASCII','ignore')
+
+def queryset_ascii(self, request):
+    if 'q' in request.GET:
+        request.GET._mutable = True
+        request.GET['q'] = to_ascii(request.GET['q'])
+    return admin.ModelAdmin.queryset(self, request)