cw 3.6 api update

views.py

@@ -14,7 +14,7 @@
 
 from simplejson import dumps
 
-from cubicweb.selectors import (one_line_rset, but_etype, implements,
+from cubicweb.selectors import (one_line_rset, implements,
                                 has_permission, relation_possible, yes,
                                 match_kwargs, score_entity,
                                 authenticated_user)
@@ -295,7 +295,7 @@
 class AddCommentAction(LinkToEntityAction):
     """add comment is like reply for everything but Comment"""
     __regid__ = 'reply_comment'
-    __select__ = LinkToEntityAction.__select__ & but_etype('Comment')
+    __select__ = LinkToEntityAction.__select__ & ~implements('Comment')
 
     etype = 'Comment'
     rtype = 'comments'