весенний данных спд - “никакого имущества не нашли для типа” исключение


Ну, я поискал в Гугле и нашел много результатов, но ни один из них не смог ответить на мой проблема. Итак, вот он идет.

Я пытаюсь изучить Весна MVC и Spring JPA для данных минимальная реализация в Pinterest клон. Итак, ниже приведен код, который я думаю, имеет отношение к моей проблеме.

Models/Entities
@Entity@Table(name = "pin_item")public class PinItem implements Serializable {    // properties ...    @JoinColumn(name = "board_id", referencedColumnName = "user_board_id")    @ManyToOne(optional = false)    private UserBoard board;    // getters and setters...}@Entity@Table(name = "user_board")public class UserBoard implements Serializable {    // properties ...    @OneToMany(cascade = CascadeType.ALL, mappedBy = "board")    private List<PinItem> pinItemList;    // getters and setters...}
Service
@Service@Transactional(readOnly = true)public class BoardServiceImpl implements BoardService {    @Autowired    private UserBoardRepository boardRepository;    @Override    public List<UserBoard> findLatestBoards() {        PageRequest request = new PageRequest(                     0, PresentationUtil.PAGE_SIZE,                      Sort.Direction.DESC, "boardId"        );        return boardRepository.findAll(request).getContent();    }    // Other Methods}
Repository
public interface UserBoardRepository extends JpaRepository<UserBoard, Integer> {}
findLatestBoardsBoardServicereturn boardRepository.findAll(request).getContent();

Теперь, когда я вызываю метод в , "никакое свойство не найден" исключение на линии . Вот выдержка из журнала котяра.

DEBUG LOG
12:28:44,254 DEBUG AnnotationTransactionAttributeSource:106 - Adding transactional method 'findLatestBoards' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''12:28:44,254 DEBUG DefaultListableBeanFactory:246 - Returning cached instance of singleton bean 'transactionManager'12:28:44,254 DEBUG JpaTransactionManager:366 - Creating new transaction with name [com.tecnooc.picpin.service.impl.BoardServiceImpl.findLatestBoards]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''12:28:44,254 DEBUG JpaTransactionManager:369 - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194] for JPA transaction12:28:44,255 DEBUG AbstractTransactionImpl:158 - begin12:28:44,255 DEBUG LogicalConnectionImpl:212 - Obtaining JDBC connection12:28:44,255 DEBUG DriverManagerDataSource:162 - Creating new JDBC DriverManager Connection to [jdbc:mysql://localhost:3306/pic_pin]12:28:44,266 DEBUG LogicalConnectionImpl:218 - Obtained JDBC connection12:28:44,267 DEBUG JdbcTransaction:69 - initial autocommit status: true12:28:44,267 DEBUG JdbcTransaction:71 - disabling autocommit12:28:44,267 DEBUG JpaTransactionManager:401 - Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@370da60e]12:28:44,274 DEBUG TransactionalRepositoryProxyPostProcessor$CustomAnnotationTransactionAttributeSource:286 - Adding transactional method 'findAll' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''12:28:44,274 DEBUG DefaultListableBeanFactory:246 - Returning cached instance of singleton bean 'transactionManager'12:28:44,274 DEBUG JpaTransactionManager:332 - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194] for JPA transaction12:28:44,274 DEBUG JpaTransactionManager:471 - Participating in existing transaction12:28:44,279 DEBUG CachedIntrospectionResults:159 - Not strongly caching class [java.io.Serializable] because it is not cache-safe12:28:44,281 DEBUG JpaTransactionManager:851 - Participating transaction failed - marking existing transaction as rollback-only12:28:44,281 DEBUG JpaTransactionManager:559 - Setting JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194] rollback-only12:28:44,283 DEBUG JpaTransactionManager:844 - Initiating transaction rollback12:28:44,284 DEBUG JpaTransactionManager:534 - Rolling back JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194]12:28:44,284 DEBUG AbstractTransactionImpl:203 - rolling back12:28:44,284 DEBUG JdbcTransaction:164 - rolled JDBC Connection12:28:44,285 DEBUG JdbcTransaction:126 - re-enabling autocommit12:28:44,285 DEBUG JpaTransactionManager:594 - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194] after transaction12:28:44,285 DEBUG EntityManagerFactoryUtils:338 - Closing JPA EntityManager12:28:44,286 DEBUG LogicalConnectionImpl:232 - Releasing JDBC connection12:28:44,286 DEBUG LogicalConnectionImpl:250 - Released JDBC connection12:28:44,287 DEBUG ExceptionHandlerExceptionResolver:132 - Resolving exception from handler [public java.lang.String com.tecnooc.picpin.controller.BoardController.latest(javax.servlet.http.HttpSession,org.springframework.ui.Model)]: org.springframework.data.mapping.PropertyReferenceException: No property board found for type com.tecnooc.picpin.model.UserBoard12:28:44,289 DEBUG ResponseStatusExceptionResolver:132 - Resolving exception from handler [public java.lang.String com.tecnooc.picpin.controller.BoardController.latest(javax.servlet.http.HttpSession,org.springframework.ui.Model)]: org.springframework.data.mapping.PropertyReferenceException: No property board found for type com.tecnooc.picpin.model.UserBoard12:28:44,290 DEBUG DefaultHandlerExceptionResolver:132 - Resolving exception from handler [public java.lang.String com.tecnooc.picpin.controller.BoardController.latest(javax.servlet.http.HttpSession,org.springframework.ui.Model)]: org.springframework.data.mapping.PropertyReferenceException: No property board found for type com.tecnooc.picpin.model.UserBoard12:28:44,291 DEBUG DispatcherServlet:959 - Could not complete request
Exceptionorg.springframework.data.mapping.PropertyReferenceException: No property board found for type com.tecnooc.picpin.model.UserBoardboardPinItemmappedBy = "board"UserBoard

Исключение составляет "". Но, если я правильно понял, то свойство присутствует и корректно отображает в .

org.springframework.data.mapping.PropertyReferenceException: No property board found for type com.tecnooc.picpin.model.UserBoard    at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:75)    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:327)    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:353)    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:307)    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:271)    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:245)    at org.springframework.data.jpa.repository.query.QueryUtils.toJpaOrder(QueryUtils.java:408)    at org.springframework.data.jpa.repository.query.QueryUtils.toOrders(QueryUtils.java:372)    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.getQuery(SimpleJpaRepository.java:456)    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.getQuery(SimpleJpaRepository.java:437)    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:319)    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:289)    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.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:333)    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:318)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)    at org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke(LockModeRepositoryPostProcessor.java:92)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)    at com.sun.proxy.$Proxy147.findAll(Unknown Source)    at com.tecnooc.picpin.service.impl.BoardServiceImpl.findLatestBoards(BoardServiceImpl.java:45)    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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)    at com.sun.proxy.$Proxy148.findLatestBoards(Unknown Source)    at com.tecnooc.picpin.controller.BoardController.latest(BoardController.java:31)    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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)    at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)    at java.lang.Thread.run(Thread.java:744)

Я не понимаю, почему этот исключение. Любая идея, почему это происходит?

Note:

Я использую Hibernate в качестве поставщика сохраняемости. Кроме того, часть кода я поместил здесь-это то, что я думал имеет отношение к проблеме. Если это не так, дайте мне знать, и я буду обновлять этот вопрос с требуемой части.