さて、私はグーグルを検索して多くの結果を見つけましたが、どれも私の問題に答えることができませんでした。だから、ここに行きます。
私はpinterest cloneの最小限の実装を行うことでSpring MVCとSpring Data JPAを研究しようとしています。だから、以下は私の問題に関連すると私が思うコードの部分です。
モデル/エンティティ
@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...
}
サービス
@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
}
リポジトリ
public interface UserBoardRepository extends JpaRepository<UserBoard, Integer> {
}
次に、でfindLatestBoards
メソッドを呼び出すとBoardService
、行に「プロパティが見つかりません」という例外がスローされreturn boardRepository.findAll(request).getContent();
ます。これは、tomcatログからの抜粋です。
デバッグログ
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 transaction
12:28:44,255 DEBUG AbstractTransactionImpl:158 - begin
12:28:44,255 DEBUG LogicalConnectionImpl:212 - Obtaining JDBC connection
12:28:44,255 DEBUG DriverManagerDataSource:162 - Creating new JDBC DriverManager Connection to [jdbc:mysql://localhost:3306/pic_pin]
12:28:44,266 DEBUG LogicalConnectionImpl:218 - Obtained JDBC connection
12:28:44,267 DEBUG JdbcTransaction:69 - initial autocommit status: true
12:28:44,267 DEBUG JdbcTransaction:71 - disabling autocommit
12:28:44,267 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 transaction
12:28:44,274 DEBUG JpaTransactionManager:471 - Participating in existing transaction
12:28:44,279 DEBUG CachedIntrospectionResults:159 - Not strongly caching class [java.io.Serializable] because it is not cache-safe
12:28:44,281 DEBUG JpaTransactionManager:851 - Participating transaction failed - marking existing transaction as rollback-only
12:28:44,281 DEBUG JpaTransactionManager:559 - Setting JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194] rollback-only
12:28:44,283 DEBUG JpaTransactionManager:844 - Initiating transaction rollback
12:28:44,284 DEBUG JpaTransactionManager:534 - Rolling back JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194]
12:28:44,284 DEBUG AbstractTransactionImpl:203 - rolling back
12:28:44,284 DEBUG JdbcTransaction:164 - rolled JDBC Connection
12:28:44,285 DEBUG JdbcTransaction:126 - re-enabling autocommit
12:28:44,285 DEBUG JpaTransactionManager:594 - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@75284194] after transaction
12:28:44,285 DEBUG EntityManagerFactoryUtils:338 - Closing JPA EntityManager
12:28:44,286 DEBUG LogicalConnectionImpl:232 - Releasing JDBC connection
12:28:44,286 DEBUG LogicalConnectionImpl:250 - Released JDBC connection
12:28:44,287 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.UserBoard
12:28:44,289 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.UserBoard
12:28:44,290 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.UserBoard
12:28:44,291 DEBUG DispatcherServlet:959 - Could not complete request
例外
例外は「org.springframework.data.mapping.PropertyReferenceException: No property board found for type com.tecnooc.picpin.model.UserBoard
」です。しかし、私が正しく理解した場合、プロパティboard
はに存在しPinItem
、で正しくマッピングさmappedBy = "board"
れUserBoard
ます。
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)
この例外がスローされる理由がわかりません。なぜそれが起こっているのですか?
注:永続プロバイダーとしてHibernateを使用しています。また、ここに記述したコード部分は、問題に関連すると思ったものです。そうでない場合は、お知らせください。必要な部分で質問を更新します。