If a substitution mapping method is not found, skip substitutions rather than...

If a substitution mapping method is not found, skip substitutions rather than raising an exception. This may happen when a web page is viewed directly, for example.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21993 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/TextDocument.py

@@ -157,7 +157,11 @@ class TextDocument(Document, TextContent):
       # avoid encoding errors.
       method_id = self.getTextContentSubstitutionMappingMethodId()
       if method_id:
+        try:
           mapping = guarded_getattr(self, method_id)(**kw)
+        except AttributeError:
+          LOG('TextDocument', WARNING, 'could not get the substitution mapping method %s from %r, so the content will not be substituted.' % (method_id, self))
+          mapping = {}
 
         is_str = isinstance(text, str)
         if is_str: