Hi all :) Let's say I have a app called "Opposites Attract". And in it I have a *User * model, and each user has a list of *Likes* and a list of *Dislikes*.
Each USER can have a maximum of: - 200 Likes. - 200 Dislikes. I want to query this information to find out for a given *Like*, what other users *Dislike* it or vice versa. I don't need to return EVERY person that likes or dislikes a particular thing. If I just returned the first 100 people found to like/dislike a particular thing, that would be acceptable. *How would it be best to model this?* Here (http://code.google.com/appengine/articles/modeling.html) it speaks of a potentially similar example under the *Many to Many* example, and if I were to implement it in this way, I would have a class like so: class User(db.Model): likes = db.ListProperty(db.Key) dislikes = db.ListProperty(db.Key) where the keys in both lists would refer to items from a *Thing* model. What I'm wondering is in the App Engine Documentation's example they mention: "In the example above, the Contact side was chosen because a single person is not likely to belong to too many groups, whereas in a large contacts database, a group might contain hundreds of members." * With that quote in mind, does this method suit my example?* I want to design this app so that hundreds of thousands of people can like or dislike a thing. So I would feel better if the above quote read "whereas in a large contacts database, a group might contain hundreds (OF THOUSANDS) of members." Also though I expect this doesn't change how I model this particular relationship I feel I should mention this in case it does: While my concern at the moment is searching ALL users that like or dislike a particular thing, my next step would be to search by *Gender* and *Location* For example: "all GIRLS who likes Dogs" "everyone in Los Angeles who dislikes Cats" -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/m3lX4RQ3FXoJ. 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.
