JPA @MappedSuperclass 에서 builder관련 질문드립니다.

Question

안녕하십니까 &#64;MappedSuperclass 관련 두 가지 문제가 생겨서 질문드립니다. 1.현재 선호제품과 비선호제품 테이블이 있고 두 테이블의 칼럼은 id, name, image로 같습니다. 선호제품savdDto, 비선호제품saveDto 이런식으로 분할된 클래스를 제품SaveDto로 같이 묶는 것이 목적입니다. 두 테이블의 칼럼이 같으니 &#64;MapperdSuperclass를 검색해보라는 글을 보고 해결하다 builder에서 막혔습니다.id, name, image가 같으니 BaseProductEntity에 모두 선언하고 그것을 구현??한 FavoriteProduct와 UnFavorableProduct에서 사용하는데 builder는 어떻게 처리해야할까요?&#64;Getter &#64;NoArgsConstructor &#64;Entity public class FavoriteProduct extends BaseProductEntity { &#64;Builder public FavoriteProduct(String userId, String productName, String image){ } } 빌더에 구현체가 없어 테스트를 진행하니 null값이 뜨고 super를 사용하니 또 에러가 발생합니다... 두 Dto를 통합하려면 &#64;MapperdSuperclass가 아니라 다른 방법을 사용해야할까요?? &#64;Getter &#64;MappedSuperclass public class BaseProductEntity { &#64;Id &#64;GeneratedValue(strategy &#61; GenerationType.IDENTITY) private Long id; private String userId; private String productName; private String image; } 2.앞서 언급한 선호제품savdDto, 비선호제품saveDto 를 합치는 과정에서 builder로 삽입하려고 합니다. 두 Dto를 합치려면 FavoriteProduct빌더와 UnFavorableProduct빌더를 Product빌더로 바꿔서 처리해야하는데 도저히 방법이 생각나지 않습니다.그래서 두 개의 칼럼은 같으니 FavoriteProduct로 받아놓고 save할 때 UnFavorableProduct에도 삽입해도 되는지요??

클라우디오 · Accepted Answer

extends한 클래스의 부모 클래스의 멤버변수를 builder패턴으로 접근하려면 &#64;Builder 대신에 &#64;SuperBuilder를 사용하셔야 정상적으로 처리가 됩니다. 해당 키워드로 검색해보시는게 좋을 것 같네요.

초무쿤 · Answer

FavoriteProduct에&#64;EqualsAndHashCode(callSuper&#61;false)를 한번 넣어보시쥬.&#64;Builder때문에 나는 오류가 아닌듯 합니다.

MelRanG · Answer

클라우디오알려주신 키워드로 검색해서 처리하려니 같은 문제가 반복돼서 답을 찾기 못해 다시 질문드립니다 ㅠㅠ&#64;Getter &#64;MappedSuperclass &#64;SuperBuilder public class BaseProductEntity { &#64;Id &#64;GeneratedValue(strategy &#61; GenerationType.IDENTITY) private Long id; private String userId; private String productName; private String image; } &#64;Entity &#64;SuperBuilder public class FavoriteProduct extends BaseProductEntity { } Entity클래스에 기본 생성자가 필요하다는 에러가 발생해서 기본 생성자를 만들면 기본 생성자안에 super()를 사용하라는 메시지가 뜹니다.super()를 넣고 안에 String타입의 변수를 넣으니 에러가 발생해 BaseProductEntityBuilder타입으로 넣었습니다.public FavoriteProduct(BaseProductEntityBuilder baseProduct){ super(baseProduct); }; 이 방법을 사용하니 기본 생성자 클래스인 public FavoriteProduct에 should have [public, protected] no-arg constructor 에러가 발생합니다. 이 과정에서 도저히 해결법을 찾기 못해서 다시 질문드립니다!

클라우디오 · Answer

올려주신 소스대로 테스트로 작성 해 봤는데, IDE에서는 별도로 오류를 잡지는 않더라구요. 혹시 실행할때 에러가 발생하는건가요? 에러메세지 전체와 소스를 자세히 올려주시는게 도움이 될 것 같습니다.

MelRanG · Answer

클라우디오감사합니다! 초기 클래스명은 Product였는데 지금은 Perfume으로 변경되었고 나머지는 같습니다우선 소스와 테스트코드먼저 올리고 오류메시지를 올리겠습니다. FavoritePerfumeimport com.patrick.perfume.domain.BasePerfumeEntity; import lombok.experimental.SuperBuilder; import javax.persistence.Entity; @Entity @SuperBuilder public class FavoritePerfume extends BasePerfumeEntity { }FavoritePerfumeRepositorypublic interface FavoritePerfumeRepository extends JpaRepository { }BasePerfumeEntity@Getter @MappedSuperclass @SuperBuilder public class BasePerfumeEntity { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String userId; private String perfumeName; private String image; }FavoritePerfumeTest@RunWith(SpringRunner.class) @SpringBootTest public class FavoritePerfumeTest { @Autowired FavoritePerfumeRepository favoriteRepo; @Test public void Favorite_저장테스트(){ favoriteRepo.save(FavoritePerfume.builder() .userId("aa") .perfumeName("bb") .image("cc") .build()); List perfumes = favoriteRepo.findAll(); FavoritePerfume favoritePerfume = perfumes.get(0); assertThat(favoritePerfume.getUserId()).isEqualTo("aa"); } } 실행하기 전 FavoritePerfume에 뜨는 에러Class 'FavoritePerfume' should have [public, protected] no-arg constructor 실행 후 테스트에 뜨는 에러No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfume; nested exception is org.hibernate.InstantiationException: No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfumeorg.springframework.orm.jpa.JpaSystemException: No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfume; nested exception is org.hibernate.InstantiationException: No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfume at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:351) at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:253) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:527) at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:61) at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:242) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:153) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:144) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$ExposeRepositoryInvocationInterceptor.invoke(CrudMethodMetadataPostProcessor.java:364) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) at com.sun.proxy.$Proxy118.findAll(Unknown Source) at com.patrick.perfume.domain.preferenceperfume.FavoritePerfumeTest.Favorite_저장테스트(FavoritePerfumeTest.java:28) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74) at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:106) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38) at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:66) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93) at com.sun.proxy.$Proxy2.processTestClass(Unknown Source) at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:117) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:155) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:137) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) at java.lang.Thread.run(Thread.java:748)Caused by: org.hibernate.InstantiationException: No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfume at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:85) at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:105) at org.hibernate.tuple.entity.AbstractEntityTuplizer.instantiate(AbstractEntityTuplizer.java:673) at org.hibernate.persister.entity.AbstractEntityPersister.instantiate(AbstractEntityPersister.java:4950) at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1682) at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1666) at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1663) at org.hibernate.loader.Loader.getRow(Loader.java:1561) at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:731) at org.hibernate.loader.Loader.processResultSet(Loader.java:990) at org.hibernate.loader.Loader.doQuery(Loader.java:948) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340) at org.hibernate.loader.Loader.doList(Loader.java:2689) at org.hibernate.loader.Loader.doList(Loader.java:2672) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506) at org.hibernate.loader.Loader.list(Loader.java:2501) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:504) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1508) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1537) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505) at org.hibernate.query.Query.getResultList(Query.java:132) at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getResultList(CriteriaQueryTypeQueryAdapter.java:74) at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:346) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359) at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200) at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:644) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:608) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:295) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ... 67 more com.patrick.perfume.domain.preferenceperfume.FavoritePerfumeTest > Favorite_저장테스트 FAILED org.springframework.orm.jpa.JpaSystemException at FavoritePerfumeTest.java:28 Caused by: org.hibernate.InstantiationException at FavoritePerfumeTest.java:282021-08-24 14:52:17.226 INFO 17240 --- [ Thread-5] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor' 2021-08-24 14:52:17.233 INFO 17240 --- [ Thread-5] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'2021-08-24 14:52:17.234 INFO 17240 --- [ Thread-5] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down' 감사합니다!

MelRanG · Answer

안에 빈 생성자를 넣었을 때 발생하는 에러import com.patrick.perfume.domain.BasePerfumeEntity; import lombok.experimental.SuperBuilder; import javax.persistence.Entity; &#64;Entity &#64;SuperBuilder public class FavoritePerfume extends BasePerfumeEntity { public FavoritePerfume(){}; } error: constructor BasePerfumeEntity in class BasePerfumeEntity cannot be applied to given types; public FavoritePerfume(){}; ^ required: BasePerfumeEntityBuilder<?,?> found: no arguments reason: actual and formal argument lists differ in length1 error FAILURE: Build failed with an exception. * What went wrong:Execution failed for task ':compileJava'.> Compilation failed; see the compiler error output for details. 이 상태에서 마우스를 publicFavoritePerfume에 가져다대면 super()를 넣으라고 뜹니다.이렇게 super를 넣으면&#64;Entity &#64;SuperBuilder public class FavoritePerfume extends BasePerfumeEntity { public FavoritePerfume(BasePerfumeEntityBuilder baseProduct){ super(baseProduct); }; } No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfume; nested exception is org.hibernate.InstantiationException: No default constructor for entity: : com.patrick.perfume.domain.favoriteperfume.FavoritePerfumeorg.springframework.orm.jpa.JpaSystemException: No default constructor for entity: 이렇게 첫번쨰 에러가 비슷한 에러가 발생합니다

MelRanG · Answer

클라우디오도움 주셔서 감사합니다 그동안 한쪽 클래스에만 생성자를 생성해봤는데 양쪽 다 &#64;NoArgsConstructor추가하니 에러가 해결됐습니다!

JPA @MappedSuperclass 에서 builder관련 질문드립니다.

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