I suggest you to use post_import_function and post_export_function. They gives you everything you need to manipulate entities.
Also check out these demos: http://bulkloadersample.appspot.com/ ---------- keakon My blog(Chinese): www.keakon.net Blog source code: https://bitbucket.org/keakon/doodle/ On Thu, Dec 16, 2010 at 9:47 PM, Justin <justin.worr...@gmail.com> wrote: > How can I force the [csv] bulkloader to create entities with 'None' > property values if the relevent bulk data field is empty, as opposed > to assuming the entity model property is missing ? > > I've tried > > - using 'import_transform: transform.none_if_empty(str)' in > bulkloader.yaml > - using 'db.StringProperty(default=None)' in the model definition > > Neither of which seems to work; what I find is > > - empty fields appear as blanks in the dev_appserver datastore viewer > [if I put a model to the datastore with an explicity 'None' field via > the interactive console, it appears as 'None'] > - I can't query the empty fields using Query.filter("field = ", None) > [the filter just gets ignored] > > Thank you. > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appeng...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com<google-appengine%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
