[appengine-java] Re: basic understanding of PersistenceManger

2011-01-19 Thread soujiro0725
/1062540/how-to-delete-all-datastor... On Jan 15, 3:05 am, soujiro0725 soujiro0...@gmail.com wrote: Hi I'm a newbie in App Engine. Right now, I am trying to develop an application myself, but my basic understanding is weak.  So someone, please clarify my knowledge. The question

[appengine-java] basic understanding of PersistenceManger

2011-01-18 Thread soujiro0725
Hi I'm a newbie in App Engine. Right now, I am trying to develop an application myself, but my basic understanding is weak. So someone, please clarify my knowledge. The question is HOW to store the data and to know what is stored. Say, I have my own class like, GCalendar(String date, String

[appengine-java] java.lang.ClassCastException:

2011-01-18 Thread soujiro0725
Hi. I keep getting an error, the code follows the error message. The problem seems to occur at ★★★HERE. after ListGCalendar calendars = (ListGCalendar) query.execute(); calendars is StreamingQueryResult object. Does the error mean that I cannot cast this object to String or Date? Could anyone