Unable to query database - QuerySyntaxException: (object) is not mapped
asiandub Aug 6, 2008 2:44 PMhi there,
(...seam noob...)
i'm posting the following problem, which i'm fighting with since hours: I am completely unable to run a selection query against my database. I can persists objects without any problems, but as soon as i'm trying to execute a query, i get an exception. So obviously i must be doing something wrong :-(
this is my scenario:
i have a user entity bean, which is annotated like this:
@Entity(name = "user") @Table(name = "USERS") @Name("user") public class User implements Serializable {...
To persist i execute the following code:
public void saveTestUser(User user) { userHome.setInstance(user); userHome.persist(); }
UserHome is more or less empty (just a factory method which i'm not calling right now):
@Name("userHome") public class UserHome extends EntityHome<User> {
Okay, here comes the problem. I'm boiled the code to something which ist just sopposed to retrieve a User from the datebase.
@Name("userList") public class UserList extends EntityQuery<User> { ... public int getUserCount() { EntityManager em = getEntityManager(); Query query = em.createQuery("select u from User u"); List<User> results = query.getResultList(); return results.size(); }
And here comes the exception:
FATAL [application] javax.ejb.EJBTransactionRolledbackException: org.hibernate.hql.ast.QuerySyntaxException: User is not mapped [select u from User u] javax.faces.el.EvaluationException: javax.ejb.EJBTransactionRolledbackException: org.hibernate.hql.ast.QuerySyntaxException: User is not mapped [select u from User u] at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91) at javax.faces.component.UICommand.broadcast(UICommand.java:383) at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:317) at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:292) at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:249) at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:462) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:154) at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:260) at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:366) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:493) at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) at java.lang.Thread.run(Thread.java:595)
(goes on forever, but no new information)
I have no idea what's going wrong. Been working on the Query-String for hours, there shouldn't be any combination of keywords left i havent't tried yet.
Help is desperatly needed ;-)
Cheers from Berlin,
Jan