Question

我遇到了JPA ManyToOne关系的问题。我有两个实体（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;
...
}

并且

@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;
 ...
}

我的测试班：

   ...
    @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);
    }

我打电话时遇到以下错误：hikeService.createHikeList（hike）;

有人知道我哪里错吗？提前谢谢。

org.springframework.transaction.TransactionSystemException：无法提交JPA事务;嵌套异常是 javax.persistence.RollbackException：提交时出错交易在 org.springframework.orm.jpa.JpaTransactionManager.doCommit（JpaTransactionManager.java:524）在 org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit（AbstractPlatformTransactionManager.java:757）在 org.springframework.transaction.support.AbstractPlatformTransactionManager.commit（AbstractPlatformTransactionManager.java:726）在 org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning（TransactionAspectSupport.java:478）在 org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction（TransactionAspectSupport.java:272）在 org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:95）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:179）在 org.springframework.aop.framework.CglibAopProxy $ DynamicAdvisedInterceptor.intercept（CglibAopProxy.java:644）在 com.breizh.packlight.service.HikelistService $$ EnhancerBySpringCGLIB $$ 38379214.createHikeList（）在 com.breizh.packlight.service.HikelistServiceTest.testCreateUser（HikelistServiceTest.java:60） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:606）at org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:47）在 org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）在 org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:44）在 org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）在 org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate（RunBeforeTestMethodCallbacks.java:74）在 org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate（RunAfterTestMethodCallbacks.java:83）在 org.springframework.test.context.junit4.statements.SpringRepeat.evaluate（SpringRepeat.java:72）在 org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:232）在 org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:89）在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 at org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:53）at at org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:229）at at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate（RunBeforeTestClassCallbacks.java:61）在 org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate（RunAfterTestClassCallbacks.java:71）在org.junit.runners.ParentRunner.run（ParentRunner.java:309）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run（SpringJUnit4ClassRunner.java:175）在 org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50）在 org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:467）在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:683）在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:390）在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:197）引起：javax.persistence.RollbackException：提交时出错交易在 org.hibernate.jpa.internal.TransactionImpl.commit（TransactionImpl.java:94）在 org.springframework.orm.jpa.JpaTransactionManager.doCommit（JpaTransactionManager.java:515） ... 37更多引起：javax.validation.UnexpectedTypeException： HV000030：找不到类型的验证器： com.breizh.packlight.domain.User。在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.verifyResolveWasUnique（ConstraintValidatorManager.java:218）在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.findMatchingValidatorClass（ConstraintValidatorManager.java:193）在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintValidatorManager.getInitializedValidator（ConstraintValidatorManager.java:97）在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints（ConstraintTree.java:125）在 org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints（ConstraintTree.java:91）在 org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint（MetaConstraint.java:85）在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint（ValidatorImpl.java:478）在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup（ValidatorImpl.java:424）在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup（ValidatorImpl.java:388）在 org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext（ValidatorImpl.java:340）在 org.hibernate.validator.internal.engine.ValidatorImpl.validate（ValidatorImpl.java:158）在 org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate（BeanValidationEventListener.java:137）在 org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert（BeanValidationEventListener.java:95）在 org.hibernate.action.internal.EntityInsertAction.preInsert（EntityInsertAction.java:206）在 org.hibernate.action.internal.EntityInsertAction.execute（EntityInsertAction.java:96）在 org.hibernate.engine.spi.ActionQueue.executeActions（ActionQueue.java:453）在 org.hibernate.engine.spi.ActionQueue.executeActions（ActionQueue.java:345）在 org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions（AbstractFlushingEventListener.java:350）在 org.hibernate.event.internal.DefaultFlushEventListener.onFlush（DefaultFlushEventListener.java:56）在org.hibernate.internal.SessionImpl.flush（SessionImpl.java:1218）在 org.hibernate.internal.SessionImpl.managedFlush（SessionImpl.java:421）在 org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit（JdbcTransaction.java:101）在 org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit（AbstractTransactionImpl.java:177）在 org.hibernate.jpa.internal.TransactionImpl.commit（TransactionImpl.java:77） ......还有38个

Answer 1

错误是：

javax.validation.UnexpectedTypeException: HV000030: No validator could be found for type: com.breizh.packlight.domain.User

由

引起

@Size(min = 1, max = 50)
private User user;

用户的大小如何在1到50之间？

验证约束适用于Java对象。不是数据库中的列。您已确保登录的大小正确，并且用户字段已映射到具有外键约束的列，因此此处@Size注释不仅不起作用，而且不必要。

JPA - 多对一关系不起作用

1 个答案: