Uncaught ResourceLockedError when cutting items in folder_contents

[maurits]

• Go to the edit tab of an item.

• Open the folder contents of its parent (maybe in a different tab).

• Select the item and cut it.

• Get an uninformative message "An error has occured".

In the error log is this traceback, which is for more informative:

2008-01-18T10:31:04 ERROR Zope.SiteErrorLog http://.../unbillable-stuff-zest/3/folder_cut
Traceback (innermost last):
  Module ZPublisher.Publish, line 119, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 42, in call_object
  Module Products.CMFFormController.FSControllerPythonScript, line 104, in __call__
  Module Products.CMFFormController.Script, line 145, in __call__
  Module Products.CMFCore.FSPythonScript, line 140, in __call__
  Module Shared.DC.Scripts.Bindings, line 313, in __call__
  Module Shared.DC.Scripts.Bindings, line 350, in _bindAndExec
  Module Products.CMFCore.FSPythonScript, line 196, in _exec
  Module None, line 10, in folder_cut
   - <FSControllerPythonScript at .../folder_cut used for .../unbillable-stuff-zest/3>
   - Line 10
  Module OFS.CopySupport, line 102, in manage_cutObjects
ResourceLockedError: Object "18" is locked via WebDAV

So I propose to catch this exception and show a more informative message to the end user.

[maurits]

This refs #2583 btw, which solved a similar issue four years ago.

[maurits]

Fixed in r22068 on Products.CMFPlone branch 3.1 and merged to trunk in r22069.