Thanks. I've tried it but it is pretty slow if I have to control it this way.
The problem I met is when I create an object and its ID is, say 1, if I run my application again, the ID becomes 2. How can I let my application have refreshed new database everytime? Because if it keeps adding the objects, it will exceed the quota anyway, isn't it? Here is my code. Everytime I run my application, 'id' will increment by 1. PersistenceManager pm = PMF.get().getPersistenceManager(); String title = "welcome"; document doc = new document(title); try{ pm.makePersistent(doc); System.out.println("id is "+doc.getID()); }finally{ pm.close(); } On Jun 29, 1:35 pm, Didier Durand <durand.did...@gmail.com> wrote: > Hi Lu, > > You can see the content of the database and delete it all from the App > Engine Console > > https://appengine.google.com/dashboard?&app_id=yourappid[Adapt > yourappid to yours] and then go to Datastore Viewer or Datastore > Statistics > > regards > didier > > On Jun 28, 4:56 pm, Lu <chenglu.annal...@gmail.com> wrote: > > > > > Hi, > > > How can I delete all the objects existed in the database? That means I > > want my application to have a empty database everytime when it gets > > started. > > > Is there anywhere actually we can see the content of the database? > > > Thanks- Hide quoted text - > > - Show quoted text - -- 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. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.