Thank you Jorge, I checked the document you mentioned, but i'm still not sure what is the reason of my issue. I added a field in JDO (Boolean successFlag), and stored several entities in datastore, I was able to see the entities with successFlag property from admin console "Datastore" -> "Data Viewer", and the values of successFlag properties were correct. The entities have the property successFlag with correct value, and the JDO class has the corresponding field, but why I could not retrieve the values of successFlag via JDO?
Jiakuan On Nov 5, 9:57 pm, Jorge <[email protected]> wrote: > You may want to check the rules that apply in this case as documented > at the bottom of this page:: > http://code.google.com/appengine/docs/java/datastore/dataclasses.html > > Jorge Gonzalez > > On Nov 4, 8:06 am, delightwjk <[email protected]> wrote: > > > Hi All, > > > I created a JDO class, which had some attributes, and I created some > > CRUD operations, all of them worked correctly. > > > Then I added a new attribute in the JDO class, and then set value to > > it and persisted it as usual when I executed CRUD operations. The > > problem is that I cannot retrieve the value of the new attribute in > > program, the value is always null. But when I check the value in > > "Datastore" -> "Data Viewer", the value is correct. So i'm wondering > > why it cannot be retrieved in application. Is there some cache > > mechanism? > > > Thanks in advance! > > Jiakuan --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
