successor.py

    wtool = getToolByName(task, 'portal_workflow')
    review_state = wtool.getInfoFor(task, 'review_state', None)
    print 'XXX', review_state

    if review_state == from_review_state:

        mtool = getToolByName(task, 'portal_membership')
        current_user_id = mtool.getAuthenticatedMember().getId()
        wf_ids = wtool.getChainFor(task)

        if wf_ids:
            wf_id = wf_ids[0]
            comment = 'Initial state after editing successor metadata.'
            wtool.setStatusOf(wf_id, task, {'review_state': to_review_state,
                                            'action' : to_review_state,
                                            'actor': current_user_id,
                                            'time': DateTime(),
                                            'comments': comment,})
            task.reindexObject()