Fixed a bug that ProxyField.get_value raise error when proxyfield does not have template field.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@16516 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ProxyField.py

@@ -513,7 +513,10 @@ class ProxyField(ZMIField):
     """
       Return a callable expression
     """
-    tales_expr = self.get_tales_expression(id)
+    try:
+      tales_expr = self.get_tales_expression(id)
+    except ValueError:
+      return None
     if tales_expr:
       return TALESValue(tales_expr)
 

product/ERP5Form/tests/testFields.py

@@ -130,6 +130,8 @@ class TestProxyField(unittest.TestCase):
                       'my_title', 'Not Title', 'ProxyField')
     proxy_field = self.container.Base_view.my_title
     self.assertEquals(None, proxy_field.getTemplateField())
+    self.assertEquals(None, proxy_field.get_value('enable'))
+    self.assertEquals(None, proxy_field.get_value('default'))
 
     proxy_field.manage_edit_xmlrpc(dict(form_id='Base_viewProxyFieldLibrary',
                                         field_id='my_title',))