Argh, I didn't test it to make sure it actually worked. Is there a bug I can star for this issue?
2009/6/23 Nick Johnson (Google) <nick.john...@google.com> > You're quite right. This will be fixed in a future release. > > -Nick Johnson > > 2009/6/23 acuth <adrian.cuthb...@gmail.com> > > >> Whenever I've tried doing a SearchableModelDescendant.all >> (keys_only=True).search(query) construction, it has failed saying it >> doesn't understand the keys_only parameter - see 'Using __key__ and >> SearchableModel >> http://groups.google.com/group/google-appengine/browse_thread/thread/73dc1dc31bfd497b >> >> Do you know if this was fixed in a recent release? >> >> Adrian >> >> >> On Jun 23, 11:33 am, "Nick Johnson (Google)" <nick.john...@google.com> >> wrote: >> > 2009/6/23 Ian Lewis <ianmle...@gmail.com> >> > >> > > ogterran, >> > >> > > It should do one for the search and then one for each item in the >> search >> > > result. >> > >> > Not quite - it will do one _query_, and multiple gets. A get is much, >> much >> > cheaper than a query. You're right about the number of round-trips, >> though. >> > >> > > If you are worried performance on the calls to the datastore you can >> modify >> > > this code to make the ProductSearchIndex entity be a child of the >> Product >> > > entity and use a key only query to retrieve only the keys for the >> search >> > > index entities (since we only really care about the Products anyway). >> > >> > Good idea! >> > >> > >> > >> > >> > >> > > This will still to the same number of queries but will avoid the >> overhead >> > > of deserializing the ProductSearchIndex objects (and the associated >> index >> > > list property which might be long). >> > >> > > Something like the following should work: >> > >> > > class Product(db.Model): >> > > pid = db.StringProperty(required=True) >> > > title = db.StringProperty(required=True) >> > > site = db.StringProperty(required=True) >> > > url = db.LinkProperty(required=True) >> > >> > > class ProductSearchIndex(search.SearchableModel): >> > > # parent == Product >> > > title = db.StringProperty(required=True) >> > >> > > ... >> > > # where you write the Product >> > > product = Product(pid = pid, title=title, site=site, url=url) >> > > product.put() >> > > index = ProductSearchIndex(parent=product, title=title) >> > > index.put() >> > >> > > ... >> > > # where you search >> > > keys = ProductSearchIndex.all(keys_only=True).search(query).fetch(100) >> > > for key in keys: >> > > product = Product.get(key.parent()) >> > > print product.url >> > >> > This can be done much more efficiently: >> > keys = ProductSearchIndex.all(keys_only=True).search(query).fetch(100) >> > products = db.get(x.parent() for x in keys) >> > >> > Now you're down to just two round-trips! >> > >> > -Nick Johnson >> > >> > >> > >> > >> > >> > > On Tue, Jun 23, 2009 at 5:59 PM, ogterran <jonathanh...@gmail.com> >> wrote: >> > >> > >> Hi Ian, >> > >> > >> Thanks for the response. >> > >> I have one question on number of datastore calls. >> > >> How many datastore calls is the query below making? >> > >> Is it 1 or 100? >> > >> > >> > class Product(db.Model): >> > >> > pid = db.StringProperty(required=True) >> > >> > title = db.StringProperty(required=True) >> > >> > site = db.StringProperty(required=True) >> > >> > url = db.LinkProperty(required=True) >> > >> > >> > class ProductSearchIndex(search.SearchableModel): >> > >> > product = db.ReferenceProperty(Product) >> > >> > title = db.StringProperty(required=True) >> > >> > >> query = ProductSearchIndex.all().search(searchtext) >> > >> results = query.fetch(100) >> > >> for i, v in enumerate(results): >> > >> print v.product.url >> > >> > >> Thanks >> > >> Jon >> > >> > > -- >> > > ======================================= >> > > 株式会社ビープラウド イアン・ルイス >> > > 〒150-0012 >> > > 東京都渋谷区広尾1-11-2アイオス広尾ビル604 >> > > email: ianmle...@beproud.jp >> > > TEL：03-5795-2707 >> > > FAX：03-5795-2708 >> > >http://www.beproud.jp/ >> > > ======================================= >> > >> > -- >> > Nick Johnson, App Engine Developer Programs Engineer >> > Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration >> Number: >> > 368047 >> >> > > > -- > Nick Johnson, App Engine Developer Programs Engineer > Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: > 368047 > > > > -- ======================================= 株式会社ビープラウド イアン・ルイス 〒150-0012 東京都渋谷区広尾1-11-2アイオス広尾ビル604 email: ianmle...@beproud.jp TEL：03-5795-2707 FAX：03-5795-2708 http://www.beproud.jp/ ======================================= --~--~---------~--~----~------------~-------~--~----~ 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-appengine@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 -~----------~----~----~----~------~----~------~--~---
