Swaminathan, None of us will explain better than the official documentation does, try it: http://code.google.com/appengine/docs/java/datastore/
*Jayr Motta* Software Developer * * I'm on BlackBeltFactory.com<http://www.blackbeltfactory.com/ui#!User/jmotta/ref=jmotta> ! On Mon, Jul 4, 2011 at 1:12 PM, Thiago Rossi <[email protected]>wrote: > You just need to retrieve it, change it and close the persistence manager. > No makePersistent method needed. > > For example: > > public void updateEmployeeTitle(User user, String newTitle) { > > > > PersistenceManager pm = PMF.get().getPersistenceManager(); > > > > try { > > > Employee e = pm.getObjectById(Employee.class, user.getEmail()); > > > > e.setTitle(newTitle); > > > > } finally { > > > > pm.close(); > > > } > } > > > If you're using Datastore , the principe is the same. > > > On 2 July 2011 18:10, Swaminathan <[email protected]> wrote: > >> Hi, >> >> This is swaminathan, am now working on GAE/J. I am happy to deploy an >> application in cloud using GAE. >> >> In my project, i have just created a record in the data store and i >> need to update/overwrite the record. >> >> When i create a record, i get a auto generated Key. I have a query >> like 'How to update/overwrite the data in the record. >> >> Can any one help me out. >> >> Thank You >> >> -- >> 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 >> [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-java?hl=en. >> >> > -- > 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 > [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-java?hl=en. > -- 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 [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-java?hl=en.
