I have create lot of Object in past. when I add a property " private double price;" to this object today .but i query the record again,the exception is throw:
java.lang.NullPointerException: Datastore entity with kind PurchaseBilling and key PurchaseBilling(178) has a null property named price. This property is mapped to com.datong.drp.model.PurchaseBilling.price, which cannot accept null values. I must clear all data and insert again? is there any other method to add this property? -- 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.
