Question

I’m having problem with FS controller page template. I had this Plone2 base product which i have eggified while doing Plone 4.2 migration. I have pasted traceback below.

Traceback (innermost last):
  Module ZPublisher.Publish, line 126, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 46, in call_object
  Module Products.CMFFormController.FSControllerPageTemplate, line 91, in __call__
  Module Products.CMFFormController.BaseControllerPageTemplate, line 26, in _call
  Module Products.CMFFormController.FormController, line 384, in validate
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 46, in call_object
  Module Products.CMFFormController.FSControllerValidator, line 58, in __call__
  Module Products.CMFFormController.Script, line 145, in __call__
  Module Products.CMFCore.FSPythonScript, line 130, in __call__
  Module Shared.DC.Scripts.Bindings, line 322, in __call__
  Module Shared.DC.Scripts.Bindings, line 359, in _bindAndExec
  Module Products.PythonScripts.PythonScript, line 344, in _exec
  Module script, line 32, in exams_list
   - <FSControllerValidator at /dev/exam/online/booking/validators/exams_list>
   - Line 32
  Module AccessControl.ZopeGuards, line 299, in guarded_import
Unauthorized: Using import with a level specification isn't supported by AccessControl: _warnings

line 32 on exams_list validators is wrap with astric

if event and not state.getErrors():
  try:
     context.script.validateEvent()
  except ValueError,exc: 
     state.setError('SIMSError',str(exc))
  **except 'dryrun':**
     state.setStatus('dryrun')

Any help or pointer always helpful.

Answer 1

Support for string exceptions was removed from Python 2.6; you’ll need to use a proper exception class for 'dryrun' instead.

You’ll need to mark that exception as importable by restricted code before you can then import it into your Controller Script.

Here is an example definition for such an exception:

from AccessControl.SecurityInfo import ModuleSecurityInfo

security = ModuleSecurityInfo('My.Product.exceptions')

security.declarePublic('DryRunException')
class DryRunException(Exception):
    '''The process was not committed, this was only a dry run'''

With the ModuleSecurityInfo information in place you can now import this exception into your script:

from My.Product.exceptions import DryRunException

and catch that instead in your except block; the code that throws this exception will need to be updated too, of course.