Hi, i got an error as below:
javax.persistence.PersistenceException:
org.datanucleus.store.appengine.FatalNucleusUserException: Received a
request to find
an object of type com.appenginedatastore.model.Gift identified by
com.appenginedatastore.model.g...@c3362f. This is not a v
alid representation of a primary key for an instance of
com.appenginedatastore.model.Gift.
at
org.datanucleus.store.appengine.jpa.DatastoreEntityManager.find(DatastoreEntityManager.java:
54)
at
com.appenginedatastore.dao.GenericDAO.findById(GenericDAO.java:60)
at
com.appenginedatastore.dao.GenericDAO.findAll(GenericDAO.java:79)
at
com.appenginedatastore.manager.GiftManager.getGifts(GiftManager.java:
86)
at org.apache.jsp.gifts_jsp._jspService(gifts_jsp.java:68)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:
806)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
324)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
292)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at
com.google.appengine.tools.development.PrivilegedJspServlet.access
$101(PrivilegedJspServlet.java:23)
at com.google.appengine.tools.development.PrivilegedJspServlet
$2.run(PrivilegedJspServlet.java:59)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:
57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:
806)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:349
My entity class is :
@Entity
public class Gift implements Serializable {
private static final long serialVersionUID = -7934383525320797864L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Persistent
private String name;
@Persistent
private String description;
@Persistent
private String blobKeyString;
.............
}
Please help, thanks.
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