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POHibernate 4 byNaturalId not working properly
 

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    <p>I am having a weird problem. I have a entity class like the following</p> <pre><code>@javax.persistence.Entity </code></pre> <p><code>@Table(name = "ADMIN") public class Admin extends Entity{</code></p> <pre><code>/** * */ private static final long serialVersionUID = 2949030196928420876L; @NaturalId @Column(name = "USERNAME", nullable = false) private String username; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } </code></pre> <p><code>}</code></p> <p>and in a method I am writing a code like:</p> <pre><code>public void sampleMethod(){ //Some code //Some code Admin admin = (Admin) session.byNaturalId(Admin.class).using("USERNAME", "ADMIN").getReference(); } </code></pre> <p>but it gives a error:</p> <pre><code>An Exception occured during get or save of Admin.: org.hibernate.HibernateException: Entity [com.edfx.tum.persist.entity.Admin] did not define a natural id at org.hibernate.internal.SessionImpl$BaseNaturalIdLoadAccessImpl.&lt;init&gt;(SessionImpl.java:2451) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at org.hibernate.internal.SessionImpl$BaseNaturalIdLoadAccessImpl.&lt;init&gt;(SessionImpl.java:2442) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at org.hibernate.internal.SessionImpl$NaturalIdLoadAccessImpl.&lt;init&gt;(SessionImpl.java:2542) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at org.hibernate.internal.SessionImpl$NaturalIdLoadAccessImpl.&lt;init&gt;(SessionImpl.java:2546) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at org.hibernate.internal.SessionImpl$NaturalIdLoadAccessImpl.&lt;init&gt;(SessionImpl.java:2550) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at org.hibernate.internal.SessionImpl$NaturalIdLoadAccessImpl.&lt;init&gt;(SessionImpl.java:2538) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at org.hibernate.internal.SessionImpl.byNaturalId(SessionImpl.java:1061) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_25] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_25] at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_25] at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:352) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] at com.sun.proxy.$Proxy50.byNaturalId(Unknown Source) at com.edfx.tum.dao.basic.BasicDAO.insertAdmins(BasicDAO.java:109) [classes:] at com.edfx.tum.dao.basic.BasicDAO.&lt;init&gt;(BasicDAO.java:50) [classes:] at com.edfx.tum.common.listeners.DatabaseLoadListener.contextInitialized(DatabaseLoadListener.java:27) [classes:] at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:3392) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.core.StandardContext.start(StandardContext.java:3850) [jbossweb-7.0.13.Final.jar:] at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:90) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final] at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_25] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_25] at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_25] </code></pre> <p>When I have defined the NaturalId, why this says natural id not defined? Please help!!</p> <p>It seems the Annotations are not working.</p>
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