old_contents: import logging
  import sys
  
  from modularodm import Q
  
  from framework.transactions.context import TokuTransaction
  from website.app import init_app
  from website.models import NodeLog
  from scripts import utils as script_utils
  
  logger = logging.getLogger(__name__)
  
  def get_targets():
      return NodeLog.find(Q('action', 'eq', NodeLog.WIKI_DELETED))
  
  def migrate(targets, dry_run=True):
      # iterate over targets
      for log in targets:
          node = log.node
          versions = node.wiki_pages_versions
          current = node.wiki_pages_current
          updated_versions = {}
          for wiki in versions:
              if wiki in current:
                  updated_versions[wiki] = versions[wiki]
          with TokuTransaction():
              node.wiki_pages_versions = updated_versions
              node.save()
              if dry_run:
                  raise RuntimeError('Dry run, transaction rolled back.')
  
  
  def main():
      dry_run = False
      if '--dry' in sys.argv:
          dry_run = True
      if not dry_run:
          script_utils.add_file_logger(logger, __file__)
      init_app(set_backends=True, routes=False)
      with TokuTransaction():
          migrate(targets=get_targets(), dry_run=dry_run)
  
  if __name__ == "__main__":
      main()
  
new_contents: import logging
  import sys
  
  from modularodm import Q
  
  from framework.transactions.context import TokuTransaction
  from website.app import init_app
  from website.models import NodeLog
  from scripts import utils as script_utils
  
  logger = logging.getLogger(__name__)
  
  def get_targets():
      return NodeLog.find(Q('action', 'eq', NodeLog.WIKI_DELETED))
  
  def migrate(targets, dry_run=True):
      # iterate over targets
      for log in targets:
          node = log.node
          versions = node.wiki_pages_versions
          current = node.wiki_pages_current
          updated_versions = {}
          for wiki in versions:
              if wiki in current:
                  updated_versions[wiki] = versions[wiki]
          node.wiki_pages_versions = updated_versions
          node.save()
  
  
  def main():
      dry_run = False
      if '--dry' in sys.argv:
          dry_run = True
      if not dry_run:
          script_utils.add_file_logger(logger, __file__)
      init_app(set_backends=True, routes=False)
      with TokuTransaction():
          migrate(targets=get_targets(), dry_run=dry_run)
          if dry_run:
              raise RuntimeError('Dry run, transaction rolled back.')
  
  if __name__ == "__main__":
      main()
  
subject: Remove TokuTransaction in migrate function