I use the 2nd method in a transaction in my app. When creating the 2 entities, there is no problems. But when I updating the 2 entities, error ocuurs and the log saids: "java.lang.IllegalArgumentException: can't operate on multiple entity groups in a single transaction. "
On Jul 7, 6:42 am, Tapir <tapir....@gmail.com> wrote: > Based on the example in the "Creating Entities With Entity Groups" > section > ofhttp://code.google.com/appengine/docs/java/datastore/transactions.htm... > > 1. > > KeyFactory.Builder keyBuilder = new > KeyFactory.Builder(Customer.class.getSimpleName(), "custid985135"); > Key parentKey = keyBuilder.getKey(); > keyBuilder.addChild(AccountInfo.class.getSimpleName(), > "acctidX142516"); > Key key = keyBuilder.getKey(); > > Customer cust = new Customer (); > cust.setKey(parentKey); > > AccountInfo acct = new AccountInfo(); > acct.setKey(key); > pm.makePersistentAll(cust, acct); > > 2 > > Key parentKey = KeyFactory.createKey > (Customer.class.getSimpleName(), "custid985135"); > Key key = KeyFactory.createKey (parentKey, > AccountInfo.class.getSimpleName(), "acctidX142516"); > > Customer cust = new Customer (); > cust.setKey(parentKey); > > AccountInfo acct = new AccountInfo(); > acct.setKey(key); > pm.makePersistentAll(cust, acct); -- 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.
