_stat = transform.parent.GetComponent<Stat>(); 이 부분에서 parent를 받아오는데, 어떻게 작동해서 누구의 parent를 받아오는지 잘 이해가 안갑니다 이해가 잘 안되어서 아마 질문도 이상할 거라고 생각이 되는데 이 점 감안해서 답변해주시면 감사하겠습니다..ㅎㅎ 간략히 하자면 저 줄의 코드가 이해가 안갑니다!

안녕하세요. 가끔 파이썬 오픈소스 프로젝트를 보면 setup.py 등등 설치하는 기법이 있는 것 같은데 해당 구조에 대한 개념은 혹시 어디서 확인이 가능한가요?

1. E05 강의 질문입니다. logback-default.xml 파일 확인하고 있는데요, 관련되서, 파일을 한번 볼수 있을까해서요, github들어가서 확인 해봤었는데 해당 파일이 없는것 같아서요 혹시 가지고 계신다면 보거나, github에 업로드 가능 할까요? 로그 최소한으로 제한 하는 부분이 궁금합니다.  2. E08 강의에 대한 질문 입니다. 스웨거 BoardType을 enum 형태로 해서, 테스트시, 스웨거 화면에서 selectbox로 BoardType을 선택 할 수 있도록 강의 내에서 나온 것 같습니다. 중간 BoardController 수정 부분이 편집 된것 같은데요..  관련부분을 알수 있을까요.. 아니면 참고 할만한 사이트 알수 있을까요? 어떤 식으로 변경 된건지.. 궁금합니다..  아니면, swagger 참고 사이트라도 알려주시면 

선생님 강의 시청도중 궁금증이 생겨서 질문남깁니다. 자바 8부터 객체 리턴시에 null이 리턴되어 참조되는걸 방지하고자 optional을 사용한다고 말씀하셨는데요 optional로 감싼 객체는 1회용으로 거기서 원래 객체를 꺼내면 메모리에 남은 optional객체는 gc가 수거해야할 쓰레기가 되는건가요? 그렇다면 무분별한 optional남용은 오버헤드를 초래할 수 있을 것 같은데요 메소드명에 OrNull을 추가해서 명시적으로 해당 메서드에서는 null이 리턴될 가능성이 있다고 알리고 사용하는 쪽에서 null값을 리턴받은경우에 대한 예외처리를 분기문등으로 진행하는게 낫지 않나요? 정확히 optional을 사용할때의 어떤 장점때문에 오버헤드의 가능성을 감수하고 사용하는 건가요?

선생님 dispatch 부분이 잘못 쓰여있다고 하는데 dispatch 타고 올라가면서 뭐가 잘못됬는지 찾아보려고 노력도 많이 했는데 도저히 모르겠습니다... https://github.com/JunYoungPark0605/boiler-plate-jun

안녕하세요 영한님. 복습 도중 에러가 발생하는 부분에 대해 의문이 생겨 질문 남깁니다. @MainDiscountPolicy 를 RateDiscountPolicy.java와 OrderServiceImpl에서 제거하면  해당 테스트 수행 시 NoUniqueBeanDefinitionException이 뜹니다. @Qualifier가 없어도 같은 타입의 빈이면 모두 맵과 리스트에 담기는 것이 이번 강의의 포인트라고 생각되는데.. 꼭 @MainDiscountPolicy가 필요하다면 같은 타입의 빈을 조회하는 아이디어가 제대로 작동하지 않는 것 아닌가요? 코드첨부 1. MainDiscountPolicy를 삭제하기 전 - 테스트 모두 통과 package hello.core2.order;import hello.core2.annotation.MainDiscountPolicy;import hello.core2.member.Grade;import hello.core2.member.Member;import org.springframework.stereotype.Component;@Component@MainDiscountPolicypublic class RateDiscountPolicy implements DiscountPolicy { private int discountPercent = 10; @Override public int discount(Member member, int price) { if (member.getGrade() == Grade.VIP) { return price * discountPercent / 100; } else { return 0; } }} package hello.core2.order;import hello.core2.annotation.MainDiscountPolicy;import hello.core2.member.Member;import hello.core2.member.MemberRepository;import lombok.RequiredArgsConstructor;import org.springframework.stereotype.Component;@Component//@RequiredArgsConstructorpublic class OrderServiceImpl implements OrderService{ private final MemberRepository memberRepository; private final DiscountPolicy discountPolicy; // 테스트용도 public MemberRepository getMemberRepository() { return memberRepository; } public OrderServiceImpl(MemberRepository memberRepository, @MainDiscountPolicy DiscountPolicy discountPolicy) { this.memberRepository = memberRepository; this.discountPolicy = discountPolicy; } @Override public Order createOrder(Long memberId, String itemName, int itemPrice) { Member member = memberRepository.findById(memberId); int discountPrice = discountPolicy.discount(member, itemPrice); return new Order(memberId, itemName, itemPrice, discountPrice); }} 코드첨부 2. MainDiscountPolicy를 삭제한 후 - 에러 발생 package hello.core2.order;import hello.core2.annotation.MainDiscountPolicy;import hello.core2.member.Grade;import hello.core2.member.Member;import org.springframework.stereotype.Component;@Component//@MainDiscountPolicypublic class RateDiscountPolicy implements DiscountPolicy { private int discountPercent = 10; @Override public int discount(Member member, int price) { if (member.getGrade() == Grade.VIP) { return price * discountPercent / 100; } else { return 0; } }} package hello.core2.order;import hello.core2.annotation.MainDiscountPolicy;import hello.core2.member.Member;import hello.core2.member.MemberRepository;import lombok.RequiredArgsConstructor;import org.springframework.stereotype.Component;@Component//@RequiredArgsConstructorpublic class OrderServiceImpl implements OrderService{ private final MemberRepository memberRepository; private final DiscountPolicy discountPolicy; // 테스트용도 public MemberRepository getMemberRepository() { return memberRepository; } public OrderServiceImpl(MemberRepository memberRepository, /*@MainDiscountPolicy*/ DiscountPolicy discountPolicy) { this.memberRepository = memberRepository; this.discountPolicy = discountPolicy; } @Override public Order createOrder(Long memberId, String itemName, int itemPrice) { Member member = memberRepository.findById(memberId); int discountPrice = discountPolicy.discount(member, itemPrice); return new Order(memberId, itemName, itemPrice, discountPrice); }} 에러내용 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'orderServiceImpl' defined in file [C:\study\core2\out\production\classes\hello\core2\order\OrderServiceImpl.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'hello.core2.order.DiscountPolicy' available: expected single matching bean but found 2: fixDiscountPolicy,rateDiscountPolicy at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:799) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:228) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1361) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1208) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:89) at hello.core2.autowired.AllBeanTest.findAllBean(AllBeanTest.java:21) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:686) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:212) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:208) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:137) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:71) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248) at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53) Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'hello.core2.order.DiscountPolicy' available: expected single matching bean but found 2: fixDiscountPolicy,rateDiscountPolicy at org.springframework.beans.factory.config.DependencyDescriptor.resolveNotUnique(DependencyDescriptor.java:220) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1285) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:886) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:790) ... 77 more

몇 가지 정리해서 말씀드리겠습니다. 1. creapple에서 제공하는 digits_model.h5파일은 무조건 0만 나오도록 가중치가 설정되어있습니다. 확인부탁드립니다. 실제로 357예제와 노트북 캠 예제 파이카메라 예제에서 모두 동일한 현상 나타납니다. 2. RBP_DL11_MNIST에서 만들어지는 digits_model.h5는 357예제와 노트북캠예제에서 정상적으로 작동합니다. 하지만 이 파일을 파이카메라 예제로 가져오면  KeyError: 'sample_weight_mode' 에러가 발생합니다. 자세한 로그는 필요하시면 올리겠습니다. ---------------------------------------------- digits_model.h5파일 확인 부탁드립니다. 유익한 강의 항상 감사하게 듣고있습니다 화이팅

1강에 랜더 샘플 주전자 데이터 파일이 없습니다.

기업회원으로 수강신청을 했는데.. 업무로 바빠서 수강기간 내에 수강을 완료하지 못해 개인돈으로 수강료을 모두 지불했습니다.개인적으로 여유있게 차근차근 다시 들으려 했는데 수강창이 사라졌습니다....ㅠㅠㅠ 더이상 수강을 할 수 없는 것인가요? 

16진수에서 0에서 9 그리고 10부터는 알파벳으로 쓴다고 나오는데 숫자를 0부터 세니까  0x0f = 16 0x10 = 17 이지 않나요? 제가 잘못 이해하고 있는거라면 죄송합니다

안녕하세요 수업 중 질문 있습니다. 해커랭크의 Revising Aggregations - The Count Function 이 문제를 풀다가 막혔는데요 SELECT COUNT(*) FROM city WHERE population >= 100000 저는 SELECT부분에서 계속 틀렸는데 SELECT COUNT (city)라고 작성하였습니다 근데 수업중 SELECT COUNT(*) 혹은 SELECT COUNT(id) 라고 작성하면 된다고 하셨는데 왜 괄호안에 * 또는 id가 오는지 모르겠습니다 그리고 해커랭크 문제 풀면서 계속 궁금한 부분이 있었는데요 문제 풀 때마다 테이블이 계속 등장하는데 저는 그 테이블 안보고 영어로 나온 문제만 읽고 푸는데요 그 표를 어떻게 해석해야 할지 , 문제와 어떻게 연관이 있는건지 잘 모르겠습니다...

처음 설치하면서 계정 생성하고 암호 입력하면 자동으로 db  생성 되지 않나요 ?  계정 ,비번 문제도 아닌거 같고, 폰트가 깨지는 거 보니  인코딩 문제일 수도  있겠는데  ...? 검색해도 안나오네요 ㅠ  Postgres는  최신형입니다. -------------------------------------------------------- org.postgresql.util.PSQLException: Ä¡¸íÀû¿À·ù: "springboot" µ¥ÀÌÅͺ£À̽º ¾øÀ½ (pgjdbc: autodetected server-encoding to be ISO-8859-1, if the message is not readable, please check database logs and/or host, port, dbname, user, password, pg_hba.conf) at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2497) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.core.v3.QueryExecutorImpl.readStartupMessages(QueryExecutorImpl.java:2618) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.core.v3.QueryExecutorImpl.<init>(QueryExecutorImpl.java:135) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:250) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.Driver.makeConnection(Driver.java:458) ~[postgresql-42.2.8.jar:42.2.8] at org.postgresql.Driver.connect(Driver.java:260) ~[postgresql-42.2.8.jar:42.2.8] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:353) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:201) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:562) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.4.1.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.1.jar:na]

안녕하세요 css를 static에 복사 붙여넣기 한 후 css 내용을 수정 후 저장 했는데 수정된 내용이 적용이 안됩니다. 장고에 원본 css 파일이 캐시파일 형태로 들어 가 있어서 css파일을 삭제 해도 대신 캐시파일때문에 깨지지 않는 것인가요?

제가 coponents를 생성해서 연결할려고 하는데 이렇게 작성을 했는데 터미널로 실행시킬때마다 밑에와 같이 변환이 자동으로 됩니다. 왜이러는 건지 궁금합니다.

넌적스에서 for문을 사용해서 게시글을 받아와 리스트 형식으로 출력하려고 하는데  for 문을 어떤식으로 써야할지 모르겠습니다 Help me plz ㅠㅠ

@Validated 는 @Requestparam 검증 에 쓰고 @Valid 는 Dto 에 쓰는 것 같은데 이렇게 하는 이유가 있나요? 반대로 하거나 둘 다 @Valid 혹은 @Validated로 하면 안되는건지 궁금합니다 그리고 스프링부트에 @Validated @Valid 예제가 많던데 그냥 스프링에 똑같이 적용해도 문제가 없는지 알고 싶습니다 감사합니다

삭제된 글입니다

좋은 강의 항상 감사드립니다! 다름이 아니라 yml이나 강사님과 똑같이 코딩을 하였고 데이터베이스도 연결이 되있는게 확실한데 어떤 부분에서 오류가 났을지 알고 싶습니다! plugins { id 'org.springframework.boot' version '2.4.6' id 'io.spring.dependency-management' version '1.0.11.RELEASE' id 'java'}group = 'jpabook'version = '0.0.1-SNAPSHOT'sourceCompatibility = '11'configurations { compileOnly { extendsFrom annotationProcessor }}repositories { mavenCentral()}dependencies { implementation 'org.springframework.boot:spring-boot-starter-data-jpa' implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' implementation 'org.springframework.boot:spring-boot-starter-validation' implementation 'org.springframework.boot:spring-boot-starter-web' //html 파일을 컴파일만 해주면 서버 재시작 없이 View 파일이 변경이 가능. implementation 'org.springframework.boot:spring-boot-devtools' compileOnly 'org.projectlombok:lombok' runtimeOnly 'com.h2database:h2' annotationProcessor 'org.projectlombok:lombok' testImplementation 'org.springframework.boot:spring-boot-starter-test' //JUnit4 추가 testImplementation("org.junit.vintage:junit-vintage-engine") { exclude group: "org.hamcrest", module: "hamcrest-core" }}test { useJUnitPlatform()} <build.gradle>도 이렇게 했습니다!  아래부터는 오류가 뜬 부분입니다! Failed to load ApplicationContext java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:132) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:124) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) 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$3.evaluate(ParentRunner.java:306) at org.junit.runners.ParentRunner.run(ParentRunner.java:413) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:43) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:82) at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:73) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94) at com.sun.proxy.$Proxy2.stop(Unknown Source) at org.gradle.api.internal.tasks.testing.worker.TestWorker.stop(TestWorker.java:133) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1786) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:771) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:763) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438) at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:123) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) ... 71 more Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1224) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1255) at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ... 87 more Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:100) at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:54) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101) at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ... 104 more

./gradlew clean build 해보면 계속 오류날겁니다. build.gradle 에 가서 id 'org.siouan.frontend-jdk11' version '5.2.0'id "org.siouan.frontend" version "3.0.2" 추가해주시구요 frontend { nodeDistributionProvided = false nodeInstallDirectory = file("${projectDir}/src/main/resources/static/node") packageJsonDirectory = file("${projectDir}/src/main/resources/static") nodeVersion = '16.0.0' assembleScript = 'run build' cleanScript = 'run clean' checkScript = 'run check'} 다른 게시글 있는것 처럼 설정해주시면 됩니다.  단, nodeVersion 을 16.0.0 이상으로 해주셔야 할겁니다. 이전 버전들은 executino Exception 이 발생하구요. 16.0.0으로 맞춰주니 잘되네요. 그리고 package.json 파일에 scripts 항목에 꼭 이걸로 바꿔주세요. "scripts": { "build": "echo Building frontend", "check": "echo Checking frontend && npm run lint && npm run test", "clean": "echo Cleaning frontend", "lint": "echo Linting frontend", "test": "echo Testing frontend"} 이거때문에 2시간 날렸습니다. 다른분들은 저같은 일 없으시길 바랍니다 ㅠㅠ

Rest 에 대한 개념에 어려움을 겪습니다 간단하게는 url 로 접속하는 api다라고 생각하는게 맞을까요 url로 접속하지 않는 api도 있을 까요