JPA - Many To One relationship not working - jpa

Question

I m having a problem with JPA ManyToOne relationship. I have two entities (HikeList, User):
#Entity
#Table(name = "T_HIKELIST")
public class Hikelist implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.TABLE)
private long id;
#Size(min = 1, max = 50)
#ManyToOne(optional = false)
#JoinColumn(name = "login", referencedColumnName = "login")
private User user;
...
}
And
#Entity
#Table(name = "T_USER")
public class User implements Serializable {
#NotNull
#Size(min = 0, max = 50)
#Id
private String login;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "user")
private Collection<Hikelist> hikeListCollection;
...
}
My test class :
...
#Test
public void testCreateUser() {
User user = new User();
user.setLogin("thomaslogin");
user.setEmail("thomas#gmail.com");
user.setPassword("thomas");
user.setFirstName("thomas");
user.setLastName("thomas");
userService.createUser(user);
Hikelist hike = new Hikelist();
hike.setId(new Long(1L));
hike.setLabel("GR20");
hike.setUser(user);
hikeService.createHikeList(hike);
Hikelist hike1 = hikeRepository.findOne(new Long(1L));
assertNotNull(hike1);
}
I m getting the following error when I m calling : hikeService.createHikeList(hike);
Does anybody know where I am wrong?
Thank you in advance.
org.springframework.transaction.TransactionSystemException: Could not
commit JPA transaction; nested exception is
javax.persistence.RollbackException: Error while committing the
transaction at
org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:524)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
at
org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:478)
at
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:272)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at
org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
at
com.breizh.packlight.service.HikelistService$$EnhancerBySpringCGLIB$$38379214.createHikeList()
at
com.breizh.packlight.service.HikelistServiceTest.testCreateUser(HikelistServiceTest.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606) at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at
org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
at
org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232)
at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at
org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at
org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at
org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: javax.persistence.RollbackException: Error while committing
the transaction at
org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:94)
at
org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:515)
... 37 more Caused by: javax.validation.UnexpectedTypeException:
HV000030: No validator could be found for type:
com.breizh.packlight.domain.User. at
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.verifyResolveWasUnique(ConstraintValidatorManager.java:218)
at
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.findMatchingValidatorClass(ConstraintValidatorManager.java:193)
at
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.getInitializedValidator(ConstraintValidatorManager.java:97)
at
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:125)
at
org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:91)
at
org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:85)
at
org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:478)
at
org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:424)
at
org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:388)
at
org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:340)
at
org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:158)
at
org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:137)
at
org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:95)
at
org.hibernate.action.internal.EntityInsertAction.preInsert(EntityInsertAction.java:206)
at
org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:96)
at
org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:453)
at
org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:345)
at
org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350)
at
org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:56)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1218)
at
org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:421)
at
org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
at
org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177)
at
org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:77)
... 38 more

Answer 1

The error is:
javax.validation.UnexpectedTypeException: HV000030: No validator could be found for type: com.breizh.packlight.domain.User
And it's caused by
#Size(min = 1, max = 50)
private User user;
How can a User have a size between 1 and 50?
Validation constraints apply the the Java objects. Not to the columns in the database. You already make sure that the login is of the right size, and the user field is mapped to a column which has a foreign key constraint, so the #Size annotation here is not only not working, but unnecessary.