diff --git a/addons/base_calendar/base_calendar.py b/addons/base_calendar/base_calendar.py
index 4d0f85376f3..62ffc7c39d8 100644
--- a/addons/base_calendar/base_calendar.py
+++ b/addons/base_calendar/base_calendar.py
@@ -325,26 +325,17 @@ class calendar_attendee(osv.osv):
                 result[id][name] = ', '.join(fromdata)
             if name == 'event_date':
                 if attdata.ref:
-                    model, res_id = tuple(attdata.ref.split(','))
-                    model_obj = self.pool.get(model)
-                    obj = model_obj.read(cr, uid, res_id, ['date'])[0]
-                    result[id][name] = obj.get('date')
+                    result[id][name] = attdata.ref.date
                 else:
                     result[id][name] = False
             if name == 'event_end_date':
                 if attdata.ref:
-                    model, res_id = tuple(attdata.ref.split(','))
-                    model_obj = self.pool.get(model)
-                    obj = model_obj.read(cr, uid, res_id, ['date_deadline'])[0]
-                    result[id][name] = obj.get('date_deadline')
+                     result[id][name] = attdata.ref.date_deadline
                 else:
                     result[id][name] = False
             if name == 'sent_by_uid':
                 if attdata.ref:
-                    model, res_id = tuple(attdata.ref.split(','))
-                    model_obj = self.pool.get(model)
-                    obj = model_obj.read(cr, uid, res_id, ['user_id'])[0]
-                    result[id][name] = obj.get('user_id')
+                    result[id][name] = (attdata.ref.user_id.id,attdata.ref.user_id.name)
                 else:
                     result[id][name] = uid
             if name == 'language':
@@ -441,8 +432,7 @@ request was delegated to"),
         for att in self.browse(cr, uid, ids, context=context):
             sign = att.sent_by_uid and att.sent_by_uid.signature or ''
             sign = '<br>'.join(sign and sign.split('\n') or [])
-            model, res_id = tuple(att.ref.split(','))            
-            res_obj = self.pool.get(model).browse(cr, uid, res_id)
+            res_obj = att.ref
             if res_obj and len(res_obj):
                 res_obj = res_obj[0]
             sub = '[%s Invitation][%d] %s'  % (company, att.id, res_obj.name)
@@ -490,9 +480,7 @@ request was delegated to"),
             if user:
                 ref = vals.get('ref', None)
                 if ref:
-                    model, event = ref.split(',')
-                    model_obj = self.pool.get(model)
-                    event_ref =  model_obj.browse(cr, uid, event, context=context)[0]
+                    event_ref = ref
                     if event_ref.user_id.id != user[0]:
                         defaults = {'user_id':  user[0]}
                         new_event = model_obj.copy(cr, uid, event, default=defaults, context=context)
diff --git a/addons/crm/crm_meeting.py b/addons/crm/crm_meeting.py
index ce818fa0189..de0f1f01c33 100644
--- a/addons/crm/crm_meeting.py
+++ b/addons/crm/crm_meeting.py
@@ -74,17 +74,14 @@ class calendar_attendee(osv.osv):
             result[id] = {}
             if name == 'categ_id':
                 if attdata.ref:
-                    model, res_id = tuple(attdata.ref.split(','))
-                    model_obj = self.pool.get(model)
-                    obj = model_obj.read(cr, uid, res_id, ['categ_id'])[0]
-                    result[id][name] = obj.get('categ_id')
+                    result[id][name] = (attdata.ref.categ_id.id,attdata.ref.categ_id.name,)
                 else:
                     result[id][name] = False
         return result
     _columns = {
         'categ_id': fields.function(_compute_data, method=True, \
                         string='Event Type', type="many2one", \
-                        relation="crm.case.categ", multi='categ_id'), 
+                        relation="crm.case.categ", multi='categ_id'),
     }
 calendar_attendee()