Here's a generic example of one of my use cases - I'm curious if anyone has any ideas I haven't thought of...
Let's say I have an app where users can buy tickets to a raffle (I'm not really creating a gambling app, this is just an example). There are two types of tickets - purchased tickets and free tickets (given away as promotions). There may be more than 1000 users with tickets to a particular raffle, but each user is unlikely to have more than 1000 tickets to a particular raffle. When a raffle ends, a winning ticket is selected from the tickets for that raffle...but here's the hard part: I would like to be able to refund, based on some logic, some or all of each user's purchased tickets for that raffle if they don't win. For example: User A has 10 purchased tickets and 10 free tickets for a raffle. He has 5 tickets remaining on his account. He doesn't win the raffle. Because his User.level == 2, he gets refunded 10 tickets. User B has the same situation, but has User.level == 3. He gets refunded all his free tickets plus 50% of his purchased tickets. Here's my current setup: Class User (db.Model): level = db.IntegerProperty paidtickets = db.IntegerProperty freetickets = db.IntegerProperty Class Ticket (db.Model): user = db.ReferenceProperty type = db.BooleanProperty (true=paid, false=free) (parent = Raffle) Class Raffle (db.Model) expires = db.DateTimeProperty winner = db.ReferenceProperty My problem is I need to be able to determine: a.) which users had tickets to a particular auction, b.) how many tickets (of each type) they had for the auction. Then I need to update all those (possible more than 1000) users to reflect the refund. What is the best way to do this without maxing out datastore cpu and query limits? ListProperties updated every time a ticket is added? How do I get around the 1000-entity limit? --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
