added auto increment system for relation fields

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@2283 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/Form.py

@@ -338,6 +338,7 @@ class ERP5Form(ZMIForm, ZopePageTemplate):
 
     # Proxy method to PageTemplate
     def __call__(self, *args, **kwargs):
+        self._v_relation_field_index = 0 # We initialize here an index which is used to generate different method ids for every field
         if not kwargs.has_key('args'):
             kwargs['args'] = args
         form = self