Question

I’m tinkering with app engine and I’ve written an edit form to edit my stored objects, let’s say they’re the model Foo.

I have this code which is all executed and doesn’t produce any exceptions yet the items in the data store remain unchanged:

class EditFooItemHandler(BaseHandler):
    page = "edit_fooitem"
    def post(self, foo_id=None):#POST
        if not foo_id is None:
            foo_id = int(foo_id)
            new_barid = int(self.request.POST['barid'])
            item = FooItem.get_by_id(int(foo_id))
            item.barid = new_barid
            logging.info( 'Saving FooItem with id=' + str(foo_id) + 'and barid=' + str(new_barid))
            item.put()

        self.prepare()
        self.values['item'] = item
        self.finish()

    def get(self, foo_id):#GET
        self.prepare()
        logging.info( 'getreq')
        logging.info( foo_id)
        item = FooItem.get_by_id(int(foo_id))
        self.values['item'] = item
        self.finish()

Any ideas why item.put() doesn’t change my data store? Thanks for your help!

Answer 1

barid 

is not defined as a property but rather as a method in the model. To make the above code work I can retrieve Bar.get_by_id(barid) and then do

new_bar = Bar.get_by_id(barid)
foo.bar = new_bar