Hello, I'm writing a replacement for del.icio.us on GAE, and am really struggling with what the right way to do the User / URL / Tag relationship:
Here's what I'm referencing for my idea: http://code.google.com/appengine/articles/modeling.html My thought is to have three Entity's: User URL Tag Then use a relationship model for the inter-relationships: class UserURLTags(db.Model): userURLs = db.ReferenceProperty(User, required=True, collection_name='urls') userTags = db.ReferenceProperty(User, required=True, collection_name='tags') urlUsers = db.ReferenceProperty(URL, required=True, collection_name='users') urlTags = db.ReferenceProperty(URL, required=True, collection_name='tags') tagUsers = db.ReferenceProperty(Tag, required=True, collection_name='users') tagURLs = db.ReferenceProperty(Tag, required=True, collection_name='urls') The idea behind this is to allow lookups for each of the following: User's URLs (get all of user xyz's URLs) User's Tags URL's Tags (get all of the tags for URL 'abc') URL's Users Tag's URLs (get all of the URLs tagged with 'efg') Tag's Users Is this just a terrible mis-understanding of the proper way of doing this association? Thanks in advance! -Ben -- 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-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
