[java-2.4] IllegalArgumentException: Not an entity: class models.User

[Johan Dahlberg]

I finally got my application to run successfully after upgrading from 2.3 to 2.4. But when I deployed it to my server I got the following error. The thing is that my model is looking like it has done since i migrated to JPA/Hibernate 6 months ago. Anyone that has seen this error before?

java.lang.IllegalArgumentException: Not an entity: class models.User

at org.hibernate.jpa.internal.metamodel.MetamodelImpl.entity(MetamodelImpl.java:203)

at org.hibernate.jpa.criteria.QueryStructure.from(QueryStructure.java:139)

at org.hibernate.jpa.criteria.CriteriaQueryImpl.from(CriteriaQueryImpl.java:173)

at dao.AbstractDAO.lambda$findOne$66(AbstractDAO.java:172)

at dao.AbstractDAO$$Lambda$39/1694746611.apply(Unknown Source)

at play.db.jpa.DefaultJPAApi.withTransaction(DefaultJPAApi.java:136)

at play.db.jpa.DefaultJPAApi.withTransaction(DefaultJPAApi.java:80)

at dao.AbstractDAO.findOne(AbstractDAO.java:169)

at models.User.authenticate(User.java:117)

at controllers.Application.authenticate(Application.java:123)

at router.Routes$$anonfun$routes$1$$anonfun$applyOrElse$5$$anonfun$apply$5.apply(Routes.scala:2827)

at router.Routes$$anonfun$routes$1$$anonfun$applyOrElse$5$$anonfun$apply$5.apply(Routes.scala:2827)

at play.core.routing.HandlerInvokerFactory$$anon$4.resultCall(HandlerInvoker.scala:136)

at play.core.routing.HandlerInvokerFactory$JavaActionInvokerFactory$$anon$14$$anon$3$$anon$1.invocation(HandlerInvoker.scala:127)

at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:70)

at play.http.DefaultHttpRequestHandler$1.call(DefaultHttpRequestHandler.java:20)

at play.core.j.JavaAction$$anonfun$7.apply(JavaAction.scala:94)

at play.core.j.JavaAction$$anonfun$7.apply(JavaAction.scala:94)

at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)

at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)

at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40)

at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:70)

at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:32)

at scala.concurrent.impl.Future$.apply(Future.scala:31)

at scala.concurrent.Future$.apply(Future.scala:492)

at play.core.j.JavaAction.apply(JavaAction.scala:94)

at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:105)

at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:105)

at play.utils.Threads$.withContextClassLoader(Threads.scala:21)

at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:104)

at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:103)

at scala.Option.map(Option.scala:146)

at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:103)

at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:96)

at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:524)

at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:524)

at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:560)

at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:560)

at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:537)

at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:537)

at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)

at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)

at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)

at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)

at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)

at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)

at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)

at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

[Johan Dahlberg]

The crash occurs at "cq.from" in this method and classType is a result of User.class:

public <A> Optional<T> findOne(String field, A value) {

        try {

            return (Optional<T>) jpaApi.withTransaction(() -> {

                CriteriaBuilder cb = JPA.em().getCriteriaBuilder();

                CriteriaQuery<T> cq = cb.createQuery(classType);

                Root<T> root = cq.from(classType);

                cq.where(cb.equal(root.get(field), value));

                try {

                    T result = JPA.em().createQuery(cq).getSingleResult();

                    return Optional.ofNullable(result);

                } catch(NoResultException ex) {

                    return Optional.empty();

                }

            });

        } catch (Throwable throwable) {

            throwable.printStackTrace();

            return Optional.empty();

        }

}

/Johan