--- a/web/facet.py	Tue Sep 27 14:57:41 2011 +0200
+++ b/web/facet.py	Tue Sep 27 16:04:30 2011 +0200
@@ -64,7 +64,7 @@
 from cubicweb import Unauthorized, typed_eid
 from cubicweb.schema import display_name
 from cubicweb.utils import make_uid
-from cubicweb.selectors import match_context_prop, partial_relation_possible
+from cubicweb.selectors import match_context_prop, partial_relation_possible, yes
 from cubicweb.appobject import AppObject
 from cubicweb.web import RequestError, htmlwidgets
 
@@ -1015,6 +1015,7 @@
     (e.g when you want to filter on entities where are not directly linked to
     the filtered entities).
     """
+    __select__ = yes() # we don't want RelationFacet's selector
     # must be specified
     path = None
     filter_variable = None
@@ -1031,8 +1032,11 @@
 
     def __init__(self, *args, **kwargs):
         super(RQLPathFacet, self).__init__(*args, **kwargs)
+        assert self.filter_variable != self.label_variable, \
+            ('filter_variable and label_variable should be different. '
+             'You may want to let label_variable undefined (ie None).')
         assert self.path and isinstance(self.path, (list, tuple)), \
-               'path should be a list of 3-uples, not %s' % self.path
+            'path should be a list of 3-uples, not %s' % self.path
         for part in self.path:
             if isinstance(part, basestring):
                 part = part.split()
@@ -1044,8 +1048,7 @@
                             ','.join(str(p) for p in self.path))
 
     def vocabulary(self):
-        """return vocabulary for this facet, eg a list of 2-uple (label, value)
-        """
+        """return vocabulary for this facet, eg a list of (label, value)"""
         select = self.select
         select.save_state()
         if self.rql_sort: