There is an _unindexed_properties private property of model class: class A(db.Expando): pass
A._unindexed_properties = frozenset(['prop']) a = A() a.prop = 1 # it's not indexed a.put() ---------- keakon My blog(Chinese): www.keakon.net Blog source code: https://bitbucket.org/keakon/doodle/ On Thu, Jul 14, 2011 at 2:40 AM, Pol <i...@pol-online.net> wrote: > Very interesting, thanks for sharing. > > If you just need a simple dictionary-like storage, why not just repr() > and eval() - wouldn't that be even faster? > > On Jul 13, 8:05 am, someone1 <someo...@gmail.com> wrote: > > I just looked into this myself. Best bet is to use a Text or Blob > > property to store in a JSON format: > > > > http://kovshenin.com/archives/pickle-vs-json-which-is-faster/ > > > > I did many tests with 250-500 expando properties and the results were > > horrendous. From digging around I didn't find a way to disable > > indexing expando properties, and this made writing them very > > expensive. > > > > On Jul 13, 1:35 am, Pol <i...@pol-online.net> wrote: > > > > > > > > > > > > > > > > > Hi, > > > > > Regarding expando properties: > > > > > 1) Can you prevent them from being indexed (I couldn't find anything > > > about this, but I'd like official confirmation)? > > > > > 2) What's the practical number of expando properties you shouldn't go > > > above? If they are all indexed, then surely that can be quite > > > expensive, so you should stay below 100 or something? > > > > > 3) If you have to be above the limit defined at #2, what's the best > > > alternative? Serializing into a blob property, possibly, but what > > > would be the most optimal serialization format? > > > > > Thanks! > > -- > 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. > > -- 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.
