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POError ValidationException: Call to TraversableResolver.isReachable() threw an exception
 

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  1. POError ValidationException: Call to TraversableResolver.isReachable() threw an exception
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    <p>I got this error when i tried to create a simple signup form which connects with database. I use Ubuntu. Here is my code :</p> <p>Signup.java</p> <pre><code>package controllers; import models.User; import play.data.Form; import play.mvc.*; import views.html.signup.*; import views.html.*; public class Signup extends Controller{ public static Form&lt;User&gt; form = form(User.class); public static Result blank(){ return ok(formsu.render(form)); } public static Result submit(){ Form&lt;User&gt; fillForm = form.bindFromRequest(); // Play mark this line !!! if(fillForm.hasErrors()) { return badRequest(formsu.render(fillForm)); } else{ User created = fillForm.get(); return ok(result.render(created)); } } } </code></pre> <p>User.java</p> <pre><code>package models; import java.util.List; import javax.persistence.Entity; import javax.validation.constraints.NotNull; import play.data.validation.Constraints.Email; import play.data.validation.Constraints.MinLength; import play.data.validation.Constraints.Required; import play.db.ebean.Model; @Entity public class User extends Model{ @Required@NotNull@MinLength(6) public String username; @Required@NotNull@MinLength(6) public String password; @Required@Email public String email; // public User(){} // // public User(String username,String password,String email){ // this.username=username; // this.password=password; // this.email=email; // } public static Finder&lt;Long, User&gt; find = new Finder(Long.class, User.class); public static List&lt;User&gt; all(){ return find.all(); } public static void create(User user){ user.save(); } } </code></pre> <p>formsup.scala.html</p> <pre><code>@(user : Form[User]) @import helper._ @helper.form(action=routes.Signup.submit){ @inputText( user("username"), '_label -&gt; "Username", '_help -&gt; "Put your username here" ) @inputPassword( user("password"), '_label -&gt; "Password", '_help -&gt; "Put your password here" ) @inputPassword( user("repeatpassword"), '_label -&gt; "Repeat password", '_help -&gt; "Put your password again" ) @inputText( user("email"), '_label -&gt; "Email", '_help -&gt; "Put your email here" ) &lt;input type="submit" value="Sign up" /&gt; } </code></pre> <p>From terminal : </p> <pre><code>--- (RELOAD) --- [info] play - database [default] connected at jdbc:mysql://localhost/login [info] play - Application started (Dev) [error] application - ! @6f07fm4f0 - Internal server error, for request [POST /signup] -&gt; play.core.ActionInvoker$$anonfun$receive$1$$anon$1: Execution exception [[ValidationException: Call to TraversableResolver.isReachable() threw an exception]] at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:134) [play_2.9.1.jar:2.0.4] at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:115) [play_2.9.1.jar:2.0.4] at akka.actor.Actor$class.apply(Actor.scala:318) [akka-actor.jar:2.0.2] at play.core.ActionInvoker.apply(Invoker.scala:113) [play_2.9.1.jar:2.0.4] at akka.actor.ActorCell.invoke(ActorCell.scala:626) [akka-actor.jar:2.0.2] at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:197) [akka-actor.jar:2.0.2] Caused by: javax.validation.ValidationException: Call to TraversableResolver.isReachable() threw an exception at org.hibernate.validator.engine.ValidatorImpl.isValidationRequired(ValidatorImpl.java:1251) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:448) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:397) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:361) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:313) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.ValidatorImpl.validate(ValidatorImpl.java:139) ~[hibernate-validator.jar:4.2.0.Final] Caused by: java.lang.RuntimeException: No @javax.persistence.Id field found in class [class models.User] at play.db.ebean.Model._idAccessors(Model.java:39) ~[play_2.9.1.jar:2.0.4] at play.db.ebean.Model._getId(Model.java:52) ~[play_2.9.1.jar:2.0.4] at play.db.ebean.Model.hashCode(Model.java:183) ~[play_2.9.1.jar:2.0.4] at org.hibernate.validator.engine.resolver.SingleThreadCachedTraversableResolver$TraversableHolder.buildHashCode(SingleThreadCachedTraversableResolver.java:153) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.resolver.SingleThreadCachedTraversableResolver$TraversableHolder.&lt;init&gt;(SingleThreadCachedTraversableResolver.java:114) ~[hibernate-validator.jar:4.2.0.Final] at org.hibernate.validator.engine.resolver.SingleThreadCachedTraversableResolver$TraversableHolder.&lt;init&gt;(SingleThreadCachedTraversableResolver.java:96) ~[hibernate-validator.jar:4.2.0.Final] </code></pre> <p>"index" and "main" html are fine :( please help me solved it. I try search it but i can't fix this error. Thanks for help!!! </p>
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