Both information were very helpful! Problem solved. Thanks! On Oct 7, 7:16 pm, "Ikai Lan (Google)" <ikai.l+gro...@google.com> wrote: > An easy way to iterate over all your entities is with the Mapper API: > > http://googleappengine.blogspot.com/2010/07/introducing-mapper-api.html > > -- > Ikai Lan > Developer Programs Engineer, Google App Engine > Blogger:http://googleappengine.blogspot.com > Reddit:http://www.reddit.com/r/appengine > Twitter:http://twitter.com/app_engine > > On Thu, Oct 7, 2010 at 10:11 AM, Didier Durand <durand.did...@gmail.com>wrote: > > > > > Hello, > > > You have to go down to low-level datastore api to do that: see > > Entity.removeProperty() > > > See > >http://code.google.com/appengine/docs/java/javadoc/com/google/appengi... > > > didier > > > On Oct 7, 2:06 pm, arny <arny...@googlemail.com> wrote: > > > Hello, > > > > I've been looking for a way to remove unused properties from existing > > > data for a while but could not find the right information yet. > > > Everyone is talking about what should not be done, but no one is > > > giving any ideas how to remove. > > > > So I can't set NULL, since it's a value as well and gets stored. > > > So how to get rid of unused properties then? > > > > On python there is delattr to remove a property completely. > > > On Java there is ... ? > > > > Thanks > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google App Engine for Java" group. > > To post to this group, send email to > > google-appengine-j...@googlegroups.com. > > To unsubscribe from this group, send email to > > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2B > > unsubscr...@googlegroups.com> > > . > > For more options, visit this group at > >http://groups.google.com/group/google-appengine-java?hl=en.
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