File._edit assume that file property is a FileObject with filename attribute.

But through Contribution Tool, file is just a StringIO object without filename attribute.
As filename is provided in kw, we fallback on kw.get('filename') to get the value
of filename instead of reading it from file.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41121 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/File.py

@@ -106,6 +106,11 @@ class File(Document, CMFFile):
       filename = getattr(file, 'filename', None)
       # if file field is empty(no file is uploaded),
       # filename is empty string.
+      if not filename:
+        # settings the filename before calling
+        # _setFile is required to setup the content_type
+        # property
+        filename = kw.get('filename')
       if filename:
         self._setFilename(filename)
       if self._isNotEmpty(file):