--- a/web/facet.py	Thu Apr 21 17:25:32 2011 +0200
+++ b/web/facet.py	Wed Apr 27 09:55:17 2011 +0200
@@ -451,6 +451,11 @@
         return False
 
 
+def encode(obj, encoding):
+    if isinstance(obj, unicode):
+        return obj.encode(encoding)
+    return unicode(obj).encode(encoding)
+
 class RelationFacet(VocabularyFacet):
     """Base facet to filter some entities according to other entities to which
     they are related. Create concret facet by inheriting from this class an then
@@ -605,7 +610,8 @@
                 insert_attr_select_relation(
                     rqlst, self.filtered_variable, self.rtype, self.role, self.target_attr,
                     select_target_entity=False)
-            values = [str(x) for x, in self.rqlexec(rqlst.as_string())]
+            encoding = self._cw.encoding
+            values = [encode(x, encoding) for x, in self.rqlexec(rqlst.as_string())]
         except:
             self.exception('while computing values for %s', self)
             return []
@@ -936,7 +942,7 @@
         """return the widget instance to use to display this facet"""
         values = set(value for _, value in self.vocabulary() if value is not None)
         # Rset with entities (the facet is selected) but without values
-        if len(values) == 0:
+        if len(values) < 2:
             return None
         return self.wdgclass(self, min(values), max(values))
 
@@ -1125,8 +1131,8 @@
 
     def _render(self):
         facet = self.facet
-        facet._cw.add_js('ui.slider.js')
-        facet._cw.add_css('ui.all.css')
+        facet._cw.add_js('jquery.ui.js')
+        facet._cw.add_css('jquery.ui.css')
         sliderid = make_uid('theslider')
         facetid = xml_escape(self.facet.__regid__)
         facet._cw.html_headers.add_onload(self.onload % {