changed the tagging widget to use ajax

cpc_project/apps/tagging_utils/urls.py

@@ -0,0 +1,5 @@
+from django.conf.urls.defaults import *
+
+urlpatterns = patterns('',
+    url(r'^autocomplete/(?P<app_label>\w+)/(?P<model>\w+)/$', 'tagging_utils.views.autocomplete', name='tagging_utils_autocomplete'),
+)

cpc_project/apps/tagging_utils/views.py

@@ -0,0 +1,23 @@
+from django.http import HttpResponse, Http404
+from django.db.models import get_model
+from django.utils import simplejson
+from tagging.models import Tag
+from django.contrib.contenttypes.models import ContentType
+
+def autocomplete(request, app_label, model):
+    try:
+        model = ContentType.objects.get(app_label=app_label, model=model)
+    except:
+        raise Http404
+
+    if not request.GET.has_key('q'):
+        raise Http404
+    else:
+        q = request.GET['q']
+
+    limit = request.GET.get('limit', None)
+
+    tags = Tag.objects.filter(items__content_type=model, name__istartswith=q).distinct().order_by('name')[:limit]
+    tag_list = '\n'.join([tag.name for tag in tags if tag])
+
+    return HttpResponse(tag_list)

cpc_project/apps/tagging_utils/widgets.py

@@ -1,8 +1,6 @@
 from django import forms
-from django.db.models import get_model
-from django.utils import simplejson
 from django.utils.safestring import mark_safe
-from tagging.models import Tag
+from django.core.urlresolvers import reverse
 
 class TagAutoCompleteInput(forms.TextInput):
     class Media:
@@ -16,16 +14,15 @@ class Media:
             'js/jquery.autocomplete.min.js'
         )
     def __init__(self, app_label, model, *args, **kwargs):
-        self.model = get_model(app_label, model)
+        self.app_label = app_label
+        self.model = model
         super(TagAutoCompleteInput, self).__init__(*args, **kwargs)
 
     def render(self, name, value, attrs=None):
         output = super(TagAutoCompleteInput, self).render(name, value, attrs)
-        page_tags = Tag.objects.usage_for_model(self.model)
-        tag_list = simplejson.dumps([tag.name for tag in page_tags], ensure_ascii=False)
 
         return output + mark_safe(u'''<script type="text/javascript">
-            jQuery("#id_%s").autocomplete(%s, {
+            jQuery("#id_%s").autocomplete('%s', {
                 max: 10,
                 highlight: false,
                 multiple: true,
@@ -35,4 +32,15 @@ def render(self, name, value, attrs=None):
                 matchContains: true,
                 autoFill: true,
             });
-            </script>''' % (name, tag_list))
+            </script>''' % (
+                name, 
+                reverse(
+                    'tagging_utils_autocomplete', 
+                    args=[], 
+                    kwargs={
+                        'app_label': self.app_label,
+                        'model': self.model
+                    }
+                )
+            )
+        )

cpc_project/urls.py

@@ -27,6 +27,7 @@
     (r'^comments/', include('threadedcomments.urls')),
     (r'^paste/', include('dpaste.urls')),
     (r'^wiki/', include('wiki.urls')),
+    (r'^tagging_utils/', include('tagging_utils.urls')),
 
     (r'^admin/(.*)', admin.site.root),
 )