hi, are you a google guy? what do you think the real usage of the key group ( or tree ) is?
for example, a forum, user entity and article entity, i set article.author to user entity, then how can i get all articles for a user? in db, i can set it with referenceproperty and get a _set ended property in user entity. in ndb, i have to use query to do this? 在 2014年7月21日星期一UTC+8上午3时02分27秒，Kaan Soral写道： > > I've also tested utilizing parent's recently, don't remember the exact > reason > > I've found out that you can't get an entity only by id, if it has a > parent, you have to know the parent too, that's why I utilized a different > method to achieve whatever I was after at that time (don't remember) > > I also like to simply get entities by their id's - so I almost never give > them parent's > > I would suggest not utilizing parent's unless you exactly know what you > are doing > > I suspect you are learning ndb, I would suggest reading > https://developers.google.com/appengine/docs/python/ndb*/ *fully > > AppEngine documentations are really easy to read and pretty fun, it > shouldn't take 3 hours to grasp all concepts related to ndb > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/d/optout.
