[appengine-java] Re: Cannot retrieve value of the newly created attribute in a JDO
I have some problems with making some ArrayList attributes persistent,i wonder whether these two problem have some similarities. Would you tell me how u fixed it or can u help me to fix my own? please. On Nov 7, 4:59 pm, delightwjk delight@gmail.com wrote: I have fixed this problem. Thanks. On Nov 6, 11:05 am, delightwjk delight@gmail.com wrote: 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 inJDO(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 JDOclass has the corresponding field, but why I could not retrieve the values of successFlag viaJDO? Jiakuan On Nov 5, 9:57 pm, Jorge athenas...@gmail.com 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 delight@gmail.com wrote: Hi All, I created aJDOclass, which had some attributes, and I created some CRUD operations, all of them worked correctly. Then I added a new attribute in theJDOclass, 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 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=.
[appengine-java] Re: Cannot retrieve value of the newly created attribute in a JDO
Would you share the solution with us? please On Nov 7, 3:59 am, delightwjk delight@gmail.com wrote: I have fixed this problem. Thanks. On Nov 6, 11:05 am, delightwjk delight@gmail.com wrote: 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 athenas...@gmail.com 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 delight@gmail.com 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 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.
[appengine-java] Re: Cannot retrieve value of the newly created attribute in a JDO
I have fixed this problem. Thanks. On Nov 6, 11:05 am, delightwjk delight@gmail.com wrote: 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 athenas...@gmail.com 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 delight@gmail.com 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 google-appengine-java@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 -~--~~~~--~~--~--~---
