add a backward compatibility code.

getFilename() should return existing source_reference value for old documents.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41748 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Document.py

@@ -787,3 +787,14 @@ class Document(DocumentExtensibleTraversableMixin, XMLObject, UrlMixin,
     if hasattr(aq_base(container), 'isIndexContent'):
       return container.isIndexContent(self)
     return False
+
+  # backward compatibility
+  def getFilename(self, default=None):
+    if self.hasFilename():
+      return self._baseGetFilename(default)
+    elif self.hasSourceReference():
+      filename = self._baseGetSourceReference(default)
+      self._setFilename(filename)
+      return filename
+    else:
+      return default