'users' are array, which is a result of DataStore fetch as I describe above. Not a dict. The code converts users array into memcacheable dict. Note that same code works fine on my test GAE instance.
On Dec 3, 12:15 pm, "Ikai L (Google)" <[email protected]> wrote: > This is a typo: > > for key in cached_mapping: > println(self, str(obj_map[key])) > > Should be: > > for key in cached_mapping: > println(self, str(cached_mapping[key])) > > This is tested and working for me. > > On Thu, Dec 3, 2009 at 12:04 PM, Ikai L (Google) <[email protected]> wrote: > > > > > What is being returned by get_multi? None or empty dictionary? Is a > > namespace being specified? > > > Here's some test code that is working for me when deployed. What might you > > be doing differently from this? > > > from google.appengine.ext import webapp > > from google.appengine.ext.webapp.util import run_wsgi_app > > from google.appengine.ext import db > > > from google.appengine.api import memcache > > > class MyThing(db.Model): > > name = db.StringProperty() > > > def __str__(self): > > return "MyThing: %s" % self.name > > > class MemcacheTest(webapp.RequestHandler): > > def get(self): > > stats = memcache.get_stats() > > > println(self, "<b>Cache Hits:%s</b><br>" % stats['hits']) > > println(self, "<b>Cache Misses:%s</b><br><br>" % stats['misses']) > > > memcache.set("data", "My data") > > data = memcache.get("data") > > println(self, "Set 'data' -> 'My data'. Get 'data' -> " + data) > > > key_range = range(1000) > > mapping = { } > > > for i in key_range: > > mapping["key%d" % i] = "value %d" % i > > > memcache.set_multi(mapping) > > println(self, "Set %d values using set_multi" % len(mapping)) > > > cached_mapping = memcache.get_multi(mapping.keys()) > > println(self, "Retrieved %d values using get_multi" % > > len(cached_mapping)) > > > namespace = "synccache" > > println(self, "Testing namespaces with namespace '%s'" % namespace) > > memcache.set_multi(mapping, namespace=namespace) > > println(self, "Set %d values using set_multi in namespace '%s'" % ( > > len(mapping), namespace )) > > > cached_mapping = memcache.get_multi(mapping.keys(), > > namespace=namespace) > > println(self, "Retrieved %d values using get_multi in namespace '%s'" % > > ( len(cached_mapping), namespace )) > > > println(self, "Testing objects") > > obj_map = {} > > for i in key_range: > > thing = MyThing(name="thing %d" % i) > > obj_map[thing.name] = thing > > > namespace = "things" > > println(self, "Testing namespaces with namespace '%s'" % namespace) > > memcache.set_multi(obj_map, namespace=namespace) > > println(self, "Set %d values using set_multi in namespace '%s'" % ( > > len(mapping), namespace )) > > > cached_mapping = memcache.get_multi(obj_map.keys(), > > namespace=namespace) > > println(self, "Retrieved %d values using get_multi in namespace '%s'" % > > ( len(cached_mapping), namespace )) > > > for key in cached_mapping: > > println(self, str(obj_map[key])) > > > def println(handler, string): > > handler.response.out.write(string + "<br/>") > > > application = webapp.WSGIApplication([ ('/cachetest', MemcacheTest), > > ], debug=True) > > > def main(): > > run_wsgi_app(application) > > > if __name__ == "__main__": > > main() > > > On Thu, Dec 3, 2009 at 11:09 AM, naan <[email protected]> wrote: > > >> I'm using memcache.set_multi() / add_multi() for caching DataStore > >> data. Code is something like following: > > >> users = User.all().query(....).fetch(...) > > >> mapping = {} > >> for u in users: > >> mapping[str(u.key())] = u > > >> memcache.set_multi(mapping, namespace='synccache') > > >> It seems that set_multi/add_multi returns correct value and there's no > >> error logs, error messages, nor exception. However, I can't retrieve > >> them with memcache.get_multi(). > > >> Thanks, > >> Kazuho > > >> On Dec 3, 10:46 am, "Ikai L (Google)" <[email protected]> wrote: > >> > We've just tried this and it seems to work for us. What are you storing > >> in > >> > Memcache? How are you generating the keys? > > >> > On Thu, Dec 3, 2009 at 10:31 AM, Ikai L (Google) <[email protected]> > >> wrote: > > >> > > Is there an error message when you try to store data? Do you see any > >> > > information in the logs? > > >> > > On Wed, Dec 2, 2009 at 5:49 PM, naan <[email protected]> wrote: > > >> > >> My app id is echofonsync and the issue remains. I can get a result > >> > >> from memcache.get_stats() now, but can not store new data. Thanks. > > >> > >> On Dec 2, 5:05 pm, "Ikai L (Google)" <[email protected]> wrote: > >> > >> > Is this issue still occurring for you? If so, let me know your > >> > >> application > >> > >> > ID. > > >> > >> > Michael, let me know if this is causing you problems in production. > >> I > >> > >> can > >> > >> > attempt to migrate your application to a different pool, but this > >> is not > >> > >> > something I'd advise if you're running in production and things are > >> > >> working > >> > >> > fine. > > >> > >> > On Wed, Dec 2, 2009 at 4:26 PM, naan <[email protected]> wrote: > >> > >> > > Hi, > > >> > >> > > This happens for me too. I can't store any data into memcache. > >> Also, I > >> > >> > > can't get any results with memcache.get_stats(). The function > >> returns > >> > >> > > None. > > >> > >> > > On Dec 2, 1:45 pm, Michael <[email protected]> wrote: > >> > >> > > > The problem with consistency is: the same key maps to the > >> different > >> > >> > > > values (when I'm hitting another memcached server), so randomly > >> I'm > >> > >> > > > getting old value from memcache and it produces weird effects > >> on my > >> > >> > > > application (like new message appearing, though they were > >> marked as > >> > >> > > > read). > > >> > >> > > > Is it going to be fixed soon? > > >> > >> > > > On Dec 2, 11:33 pm, Michael <[email protected]> wrote: > > >> > >> > > > > At the time of the first post it was going for about 10 > >> minutes. > > >> > >> > > > > It's still happening. > > >> > >> > > -- > > >> > >> > > You received this message because you are subscribed to the > >> Google > >> > >> Groups > >> > >> > > "Google App Engine" group. > >> > >> > > To post to this group, send email to > >> > >> [email protected]. > >> > >> > > To unsubscribe from this group, send email to > >> > >> > > [email protected]<google-appengine%[email protected]> > >> <google-appengine%[email protected]<google-appengine%[email protected]> > > >> > >> <google-appengine%[email protected]<google-appengine%[email protected]> > >> <google-appengine%[email protected]<google-appengine%[email protected]> > > >> > >> > > . > >> > >> > > For more options, visit this group at > >> > >> > >http://groups.google.com/group/google-appengine?hl=en. > > >> > >> > -- > >> > >> > Ikai Lan > >> > >> > Developer Programs Engineer, Google App Engine > > >> > >> -- > > >> > >> You received this message because you are subscribed to the Google > >> Groups > >> > >> "Google App Engine" group. > >> > >> To post to this group, send email to > >> [email protected]. > >> > >> To unsubscribe from this group, send email to > >> > >> [email protected]<google-appengine%[email protected]> > >> <google-appengine%[email protected]<google-appengine%[email protected]> > > >> > >> . > >> > >> For more options, visit this group at > >> > >>http://groups.google.com/group/google-appengine?hl=en. > > >> > > -- > >> > > Ikai Lan > >> > > Developer Programs Engineer, Google App Engine > > >> > -- > >> > Ikai Lan > >> > Developer Programs Engineer, Google App Engine > > >> -- > > >> You received this message because you are subscribed to the Google Groups > >> "Google App Engine" group. > >> To post to this group, send email to [email protected]. > >> To unsubscribe from this group, send email to > >> [email protected]<google-appengine%[email protected]> > >> . > >> For more options, visit this group at > >>http://groups.google.com/group/google-appengine?hl=en. > > > -- > > Ikai Lan > > Developer Programs Engineer, Google App Engine > > -- > Ikai Lan > Developer Programs Engineer, Google App Engine -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
