From ef3c7090ec262137d8743e0a3b0b044280edb092 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 23 Aug 2010 23:56:56 +0200
Subject: [PATCH] Skip non ModelStorage from foreign key operations
 (transplanted from 14ea0be5eb7f4376b4529dfa8005b3e2d17fa70c)

---
 trytond/model/modelsql.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/trytond/model/modelsql.py b/trytond/model/modelsql.py
index 336bd16b43..5ff3bd95ef 100644
--- a/trytond/model/modelsql.py
+++ b/trytond/model/modelsql.py
@@ -1034,6 +1034,8 @@ class ModelSQL(ModelStorage):
             if hasattr(model, 'table_query') \
                     and model.table_query(context):
                 continue
+            if not isinstance(model, ModelStorage):
+                continue
             for field_name, field in model._columns.iteritems():
                 if isinstance(field, fields.Many2One) \
                         and field.model_name == self._name: