Index: src/django_gheat/website/filters.py
===================================================================
--- src/django_gheat/website/filters.py	(revision 9223)
+++ src/django_gheat/website/filters.py	(revision 9224)
@@ -53,2 +53,31 @@
   datasetlist = serializers.serialize('json', datasets, fields=('naam', 'gebruiker'))
   return datasetlist
+
+
+def foo_filter(request):
+  """Example json input for dynamic filter using multiple objects example:
+  http://lijst.wirelessleiden.nl/pipermail/techniek/2011-May/005516.html"""
+  result = list()
+  for user in Gebruiker.objects.all().order_by('naam'):
+    entry = {'gebruiker' : user.naam}
+    meetrondje_list = list()
+    for mr in MeetRondje.objects.filter(gebruiker=user).order_by('naam'):
+      # Get list if accespoints found in the specific 'Meting', and make this is list.
+      wirelessleiden_ssid = Meting.objects.filter(meetrondje=mr,
+        accespoint__ssid__contains='WirelessLeiden').\
+        values_list('accespoint__ssid',flat=True).\
+        order_by('accespoint__ssid').distinct()
+      # The explicit cast to list is required as django lists are special and
+      # cannot be handled by simplejson.
+      meetrondje_list.append(
+        {
+          'naam' : mr.naam,
+          'nodes' : list(wirelessleiden_ssid)
+        }
+      )
+    entry['meetrondje'] = meetrondje_list
+    result.append(entry)
+
+  # Pretty formatting, makes debugging the json responses more easy
+  json_response = simplejson.dumps(result,indent=2*' ')
+  return HttpResponse(json_response, content_type='application/javascript; charset=utf8')
Index: src/django_gheat/website/urls.py
===================================================================
--- src/django_gheat/website/urls.py	(revision 9223)
+++ src/django_gheat/website/urls.py	(revision 9224)
@@ -43,3 +43,4 @@
         name = 'serve_filter',
        ),
-    )
+    url(r'^foofilter/$', 'foo_filter'),
+  )