diff -r 39b7a91a3f4c -r 032825bbacab server/hook.py
--- a/server/hook.py	Thu Jan 23 12:32:16 2014 +0100
+++ b/server/hook.py	Thu Jan 23 13:47:28 2014 +0100
@@ -460,10 +460,10 @@
         if kwargs.get('rtype') not in self.expected:
             return 0
         if self.frometypes is not None and \
-               req.describe(kwargs['eidfrom'])[0] not in self.frometypes:
+               req.entity_metas(kwargs['eidfrom'])['type'] not in self.frometypes:
             return 0
         if self.toetypes is not None and \
-               req.describe(kwargs['eidto'])[0] not in self.toetypes:
+               req.entity_metas(kwargs['eidto'])['type'] not in self.toetypes:
             return 0
         return 1
 
@@ -604,7 +604,7 @@
     def __call__(self):
         assert self.main_rtype
         for eid in (self.eidfrom, self.eidto):
-            etype = self._cw.describe(eid)[0]
+            etype = self._cw.entity_metas(eid)['type']
             if self.main_rtype not in self._cw.vreg.schema.eschema(etype).subjrels:
                 return
         if self.rtype in self.subject_relations:
@@ -640,7 +640,7 @@
     skip_object_relations = ()
 
     def __call__(self):
-        eschema = self._cw.vreg.schema.eschema(self._cw.describe(self.eidfrom)[0])
+        eschema = self._cw.vreg.schema.eschema(self._cw.entity_metas(self.eidfrom)['type'])
         execute = self._cw.execute
         for rel in self.subject_relations:
             if rel in eschema.subjrels and not rel in self.skip_subject_relations:
@@ -664,7 +664,7 @@
     events = ('after_delete_relation',)
 
     def __call__(self):
-        eschema = self._cw.vreg.schema.eschema(self._cw.describe(self.eidfrom)[0])
+        eschema = self._cw.vreg.schema.eschema(self._cw.entity_metas(self.eidfrom)['type'])
         execute = self._cw.execute
         for rel in self.subject_relations:
             if rel in eschema.subjrels and not rel in self.skip_subject_relations: