강의교안 링크에서 강의교안을 찾을수가 없습니다. 강의교안 받으려면 어떻게 해야 하나요?

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오) 예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 예3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오) 예[질문 내용] 입구가 하나면 트레픽이 몰리면 어떻게 되나요?

다음과 같은 예외가 계속 발생하는데, DB에 있는 table을 drop 했다가 실행시키면 정상 작동해서 계속 진행했습니다.   persistence.xml 에는  `<property name="hibernate.hbm2ddl.auto" value="create" />` 로 설정하였습니다. 제 생각으로는 기존의 table들을 모두 drop하고 실행하는 거라 정상 작동되어야 한다고 생각하는데 다음과 같은 에러가 발생하는 이유가 궁금합니다.   https://github.com/siyeonSon/jpa-basic/tree/master/hellojpa 프로젝트 파일 함께 첨부합니다!   C:\Users\sondo\.jdks\corretto-16.0.2\bin\java.exe "-javaagent:C:\IntelliJ\IntelliJ IDEA Community Edition 2020.3.3\lib\idea_rt.jar=12009:C:\IntelliJ\IntelliJ IDEA Community Edition 2020.3.3\bin" -Dfile.encoding=UTF-8 -classpath C:\jpa-basic\hellojpa\target\classes;C:\Users\sondo\.m2\repository\org\hibernate\hibernate-entitymanager\5.3.10.Final\hibernate-entitymanager-5.3.10.Final.jar;C:\Users\sondo\.m2\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;C:\Users\sondo\.m2\repository\org\hibernate\hibernate-core\5.3.10.Final\hibernate-core-5.3.10.Final.jar;C:\Users\sondo\.m2\repository\org\javassist\javassist\3.23.2-GA\javassist-3.23.2-GA.jar;C:\Users\sondo\.m2\repository\antlr\antlr\2.7.7\antlr-2.7.7.jar;C:\Users\sondo\.m2\repository\org\jboss\jandex\2.0.5.Final\jandex-2.0.5.Final.jar;C:\Users\sondo\.m2\repository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;C:\Users\sondo\.m2\repository\javax\activation\javax.activation-api\1.2.0\javax.activation-api-1.2.0.jar;C:\Users\sondo\.m2\repository\org\dom4j\dom4j\2.1.1\dom4j-2.1.1.jar;C:\Users\sondo\.m2\repository\org\hibernate\common\hibernate-commons-annotations\5.0.4.Final\hibernate-commons-annotations-5.0.4.Final.jar;C:\Users\sondo\.m2\repository\javax\persistence\javax.persistence-api\2.2\javax.persistence-api-2.2.jar;C:\Users\sondo\.m2\repository\net\bytebuddy\byte-buddy\1.9.5\byte-buddy-1.9.5.jar;C:\Users\sondo\.m2\repository\org\jboss\spec\javax\transaction\jboss-transaction-api_1.2_spec\1.1.1.Final\jboss-transaction-api_1.2_spec-1.1.1.Final.jar;C:\Users\sondo\.m2\repository\com\h2database\h2\1.4.200\h2-1.4.200.jar;C:\Users\sondo\.m2\repository\javax\xml\bind\jaxb-api\2.3.0\jaxb-api-2.3.0.jar hellojpa.JpaMain 6월 17, 2022 7:38:01 오후 org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformation INFO: HHH000204: Processing PersistenceUnitInfo [ name: hello ...] 6월 17, 2022 7:38:01 오후 org.hibernate.Version logVersion INFO: HHH000412: Hibernate Core {5.3.10.Final} 6월 17, 2022 7:38:01 오후 org.hibernate.cfg.Environment <clinit> INFO: HHH000206: hibernate.properties not found 6월 17, 2022 7:38:02 오후 org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit> INFO: HCANN000001: Hibernate Commons Annotations {5.0.4.Final} 6월 17, 2022 7:38:02 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!) 6월 17, 2022 7:38:02 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO: HHH10001005: using driver [org.h2.Driver] at URL [jdbc:h2:tcp://localhost/~/test] 6월 17, 2022 7:38:02 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO: HHH10001001: Connection properties: {user=sa} 6월 17, 2022 7:38:02 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO: HHH10001003: Autocommit mode: false 6월 17, 2022 7:38:02 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections <init> INFO: HHH000115: Hibernate connection pool size: 20 (min=1) 6월 17, 2022 7:38:02 오후 org.hibernate.dialect.Dialect <init> INFO: HHH000400: Using dialect: org.hibernate.dialect.H2Dialect Hibernate:           drop table Album if exists Hibernate:           drop table Book if exists Hibernate:           drop table Child if exists Hibernate:           drop table Locker if exists Hibernate:           drop table Member if exists 6월 17, 2022 7:38:04 오후 org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@3d37203b] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode. 6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     drop table Locker if exists" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     drop table Locker if exists" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlString(SchemaDropperImpl.java:375) at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlStrings(SchemaDropperImpl.java:359) at org.hibernate.tool.schema.internal.SchemaDropperImpl.dropFromMetadata(SchemaDropperImpl.java:241) at org.hibernate.tool.schema.internal.SchemaDropperImpl.performDrop(SchemaDropperImpl.java:154) at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:126) at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:112) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:144) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Cannot drop "LOCKER" because "FK332130JLG9S5HYEUK7GFGI052" depends on it; SQL statement:       drop table Locker if exists [90107-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.command.ddl.DropTable.prepareDrop(DropTable.java:98) at org.h2.command.ddl.DropTable.update(DropTable.java:124) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     drop table Member if exists" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     drop table Member if exists" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlString(SchemaDropperImpl.java:375) at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlStrings(SchemaDropperImpl.java:359) at org.hibernate.tool.schema.internal.SchemaDropperImpl.dropFromMetadata(SchemaDropperImpl.java:241) at org.hibernate.tool.schema.internal.SchemaDropperImpl.performDrop(SchemaDropperImpl.java:154) at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:126) at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:112) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:144) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Cannot drop "MEMBER" because "FKJNJ8UNGT7V35Y6LFXUXCRJBBR" depends on it; SQL statement:       drop table Member if exists [90107-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.command.ddl.DropTable.prepareDrop(DropTable.java:98) at org.h2.command.ddl.DropTable.update(DropTable.java:124) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     drop table Team if exists" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     drop table Team if exists" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlString(SchemaDropperImpl.java:375) at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlStrings(SchemaDropperImpl.java:359) at org.hibernate.tool.schema.internal.SchemaDropperImpl.dropFromMetadata(SchemaDropperImpl.java:241) at org.hibernate.tool.schema.internal.SchemaDropperImpl.performDrop(SchemaDropperImpl.java:154) at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:126) at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:112) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:144) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Cannot drop "TEAM" because "FKL7WSNY760HJY6X19KQNDUASBM" depends on it; SQL statement:       drop table Team if exists [90107-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.command.ddl.DropTable.prepareDrop(DropTable.java:98) at org.h2.command.ddl.DropTable.update(DropTable.java:124) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   Hibernate:           drop table MemberProduct if exists Hibernate:           drop table Movie if exists Hibernate:           drop table Parent if exists Hibernate:           drop table Product if exists Hibernate:           drop table Team if exists Hibernate:           drop sequence if exists hibernate_sequence Hibernate: create sequence hibernate_sequence start with 1 increment by 1 Hibernate:           create table Album (        id bigint not null,         name varchar(255),         price integer not null,         artist varchar(255),         primary key (id)     ) Hibernate:           create table Book (        id bigint not null,         name varchar(255),         price integer not null,         author varchar(255),         isbn varchar(255),         primary key (id)     ) Hibernate:           create table Child (        id bigint not null,         name varchar(255),         parent_id bigint,         primary key (id)     ) Hibernate:           create table Locker (        id bigint not null,         name varchar(255),         primary key (id)     ) Hibernate:           create table Member (        MEMBER_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         USERNAME varchar(255),         LOCKER_ID bigint,         TEAM_ID bigint,         primary key (MEMBER_ID)     ) Hibernate:           create table MemberProduct (        id bigint not null,         MEMBER_ID bigint,         PRODUCT_ID bigint,         primary key (id)     ) Hibernate:           create table Movie (        id bigint not null,         name varchar(255),         price integer not null,         actor varchar(255),         director varchar(255),         primary key (id)     ) 6월 17, 2022 7:38:04 오후 org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@d0865a3] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode. 6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     create table Locker (        id bigint not null,         name varchar(255),         primary key (id)     )" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     create table Locker (        id bigint not null,         name varchar(255),         primary key (id)     )" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:315) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "LOCKER" already exists; SQL statement:       create table Locker (        id bigint not null,         name varchar(255),         primary key (id)     ) [42101-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.command.ddl.CreateTable.update(CreateTable.java:89) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     create table Member (        MEMBER_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         USERNAME varchar(255),         LOCKER_ID bigint,         TEAM_ID bigint,         primary key (MEMBER_ID)     )" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     create table Member (        MEMBER_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         USERNAME varchar(255),         LOCKER_ID bigint,         TEAM_ID bigint,         primary key (MEMBER_ID)     )" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:315) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "MEMBER" already exists; SQL statement:       create table Member (        MEMBER_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         USERNAME varchar(255),         LOCKER_ID bigint,         TEAM_ID bigint,         primary key (MEMBER_ID)     ) [42101-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.command.ddl.CreateTable.update(CreateTable.java:89) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     create table Team (        TEAM_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         name varchar(255),         primary key (TEAM_ID)     )" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     create table Team (        TEAM_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         name varchar(255),         primary key (TEAM_ID)     )" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:315) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "TEAM" already exists; SQL statement:       create table Team (        TEAM_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         name varchar(255),         primary key (TEAM_ID)     ) [42101-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.command.ddl.CreateTable.update(CreateTable.java:89) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   Hibernate:           create table Parent (        id bigint not null,         name varchar(255),         primary key (id)     ) Hibernate:           create table Product (        id bigint not null,         name varchar(255),         primary key (id)     ) Hibernate:           create table Team (        TEAM_ID bigint not null,         INSERT_MEMBER varchar(255),         createdDate timestamp,         UPDATE_MEMBER varchar(255),         lastModifiedDate timestamp,         name varchar(255),         primary key (TEAM_ID)     ) Hibernate:           alter table Child         add constraint FKlh67j1n7x7gt59u0pbkwqh6o6         foreign key (parent_id)         references Parent Hibernate:           alter table Member         add constraint FK332130jlg9s5hyeuk7gfgi052         foreign key (LOCKER_ID)         references Locker Hibernate:           alter table Member         add constraint FKl7wsny760hjy6x19kqnduasbm         foreign key (TEAM_ID)         references Team Hibernate:           alter table MemberProduct         add constraint FKjnj8ungt7v35y6lfxuxcrjbbr         foreign key (MEMBER_ID)         references Member Hibernate:           alter table MemberProduct         add constraint FKrgt6jorh7iaec1tae84ljye8c         foreign key (PRODUCT_ID)         references Product 6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     alter table Member         add constraint FK332130jlg9s5hyeuk7gfgi052         foreign key (LOCKER_ID)         references Locker" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     alter table Member         add constraint FK332130jlg9s5hyeuk7gfgi052         foreign key (LOCKER_ID)         references Locker" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:375) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Constraint "FK332130JLG9S5HYEUK7GFGI052" already exists; SQL statement:       alter table Member         add constraint FK332130jlg9s5hyeuk7gfgi052         foreign key (LOCKER_ID)         references Locker [90045-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.command.ddl.AlterTableAddConstraint.tryUpdate(AlterTableAddConstraint.java:114) at org.h2.command.ddl.AlterTableAddConstraint.update(AlterTableAddConstraint.java:78) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL "     alter table Member         add constraint FKl7wsny760hjy6x19kqnduasbm         foreign key (TEAM_ID)         references Team" via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "     alter table Member         add constraint FKl7wsny760hjy6x19kqnduasbm         foreign key (TEAM_ID)         references Team" via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:375) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:14) Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Constraint "FKL7WSNY760HJY6X19KQNDUASBM" already exists; SQL statement:       alter table Member         add constraint FKl7wsny760hjy6x19kqnduasbm         foreign key (TEAM_ID)         references Team [90045-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.command.ddl.AlterTableAddConstraint.tryUpdate(AlterTableAddConstraint.java:114) at org.h2.command.ddl.AlterTableAddConstraint.update(AlterTableAddConstraint.java:78) at org.h2.command.CommandContainer.update(CommandContainer.java:198) at org.h2.command.Command.executeUpdate(Command.java:251) at org.h2.server.TcpServerThread.process(TcpServerThread.java:406) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:832)   at org.h2.message.DbException.getJdbcSQLException(DbException.java:576) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:237) at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:228) at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:201) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 15 more   6월 17, 2022 7:38:04 오후 org.hibernate.tool.schema.internal.SchemaCreatorImpl applyImportSources INFO: HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@103082dd' Hibernate:      call next value for hibernate_sequence Hibernate:      call next value for hibernate_sequence Hibernate:      call next value for hibernate_sequence Hibernate:      /* insert hellojpa.entity.cascade.Parent         */ insert          into             Parent             (name, id)          values             (?, ?) Hibernate:      /* insert hellojpa.entity.cascade.Child         */ insert          into             Child             (name, parent_id, id)          values             (?, ?, ?) Hibernate:      /* insert hellojpa.entity.cascade.Child         */ insert          into             Child             (name, parent_id, id)          values             (?, ?, ?) 6월 17, 2022 7:38:04 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop INFO: HHH10001008: Cleaning up connection pool [jdbc:h2:tcp://localhost/~/test]   Process finished with exit code 0  

[질문 템플릿]1. 강의 내용과 관련된 질문인가요? 예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? 예3. 질문 잘하기 메뉴얼을 읽어보셨나요? 예[질문 내용] 안녕하세요. 본 강의를 통해 스프링 공부를 시작한 학생입니다. 강의를 듣다가 궁금한 점이 생겨 질문 드립니다.   domain의 Member 클래스에도 Getter, Setter가 있고, controller의 MemberForm 클래스에도 Getter, Setter가 있는데   MemberController의 create 함수에서 member.setName은 있고 form.setName은 없는 이유가 궁금합니다.   createMemberForm.html의 <form action="/members/new/ method="post">를 통해 사용자가 입력한 "spring"이라는 이름이 value값으로 넘어가는 것, 그리고 @PostMapping이 있는 create 함수로 넘어가는 것까진 이해했는데 왜 이 함수에서 MemberForm의 set 함수 코드는 없는 것인지 궁금합니다.   사용자가 이름을 입력했을 때, 스프링이 자동으로 MemberForm의 name 값을 입력한 이름으로 설정해준 건가요?   답변 미리 감사합니다.

for(char a : str)이 어떤 의미인지 궁금합니다. 강의에 잠깐 나오는 내용으로는 문자열 내의 문자마다 for문이 도는 걸로 내용상 이해가 되는데 맞에 이해한 건가요?

note 가 있는 경우 title 과 content 만 입력해주고 있어서 color 는 rosBud 로 전부 보이는것 같은데..(5:40) 제가 코드를 완전히 똑같게 실습하고 있지는 않아서 놓친게 있는건지 궁금합니다 ~

=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예) ================================================== (수정)깃헙링크를 안올렸네요. 죄송합니다ㅠ https://github.com/young0264/jpashop 코드 참고 부탁드립니다..!   웹 계층개발 첫강의에서 원하는 view가 안나옵니다.. spring boot 2.7 에서 2.4.1버전으로 다운그레이드도 하였는데 안되네요.. 커뮤니티 게시글에 올라온 버전문제, 강의를 다시 한번씩 살피면서 코드를 전체적으로 한번 다 봤는데 어떻게 손을봐야할지를 모르겠습니다..   현재 home.html을 열어보면 fragments파일의 footer, bodyHeader , header 파일들이 개별적으로는 실행이 되는데 fragments 의 파일들이 적용이 안되어 있는거보면 이 연결이 안되는게 문제인 것 같아요..   어디를 수정하면 되는지 한말씀만 주시면 감사하겠습니다 ..!ㅠ (스프링부트는 2.4.1 , bootstrap은 강의와 같은버전입니다)   ================================================================ 부트스트랩이 적용안될시 게시판에 올라온 해결책중 두가지를 적용해봤습니다. 1. css폴더에 jumbotron.css 코드를 추가한것(지우고 넣고 두방법 해봣지만 모두 다 안됩니다) 2. 부트스트랩의 버전이 맞지않은경우에 header.html 의 css쪽의 stylesheet 주소를 바꿔줘야 하는경우입니다. 버전이 현재 4.3.1(강의와 같음) 이지만 해상페이지에 들어가서 확인해보고 (같았습니다)수업과 같지만 바꿔주었습니다. https://getbootstrap.com/docs/4.3/getting-started/introduction/ 일단 이 두방법을 시도했기에 참고 부탁드립니다..  

안녕하세요 강의 잘보고 있습니다!tailwind css를 사용하는 방법으로 CDN을 script로 가져와서 사용하는 방법과 tailwind CLI를 사용해서 작성한 클래스들을 컴파일해서 사용하는 방법으로 보았습니다. 하지만 컴파일된 output.css 파일에는 제가 페이지를 작성하면서 사용한 클래스들을 css로 컴파일해주는 것이라 다양한 클래스를 미리 컴파일 하기 어려워 보이는데요 ,, 혹시 https://unpkg.com/tailwindcss@2.2.19/dist/tailwind.min.css 이런식으로 되어있는 min.css 처럼 3 버전 이후의 소스를 min.css로 가져 올 수 있거나, 혹은 미리 컴파일하는 방법에 대해서 알 수 있을까요?

혹시, 강의 노션을 공유 받을 수 있을까요?

안녕하세요. 해당 강의를 수강하면서 블로그에 강의 내용 (강사님의 설명 혹은 자료 등)을 정리하고자 하는데 가능한지 궁금합니다.

build 하실 때  -f옵션은 dev파일이 아니니깐 안써도 되고  -t도 안쓰셨는데 run할때는 docker run -p 8080:80 이미지이름 으로 run하는걸로 보이더라구요 근데 왜 실행이 잘 되는가요?

강의 후반부에 유저 모드일경우 시스템콜을 못하게 막는다고 되어있는데   컴퓨터의 자원에 직접 접근하려면 결국 유저모드 상태에서 시스템콜 호출을 통해 커널모드로 바뀐상태가 돼야 가능한건데 그럼 유저모드상태일때는 어떻게? 누가? 시스템콜 호출을 하는거죠??  

강사님 안녕하세요. 스프링 카프카로 공부를 하는 중, 궁금증이 생겨서 문의를 드립니다.   @KafkaListner 를 사용해서 컨슈머 리스너를 구현하였습니다. 리밸런스가 일어날 때, 메시지 중복 처리 발생을 막기 위한 예제를 직접 만들어 보고있는데요.   500개 레코드를 Poll 해온 뒤, 300번째 정도 레코드를 읽었을 때 Rolling Update 가 진행되도록 상황을 만들어서 리밸런싱이 발생하도록 하였습니다. 스프링 카프카에서 제공되는 ConsumerAwareRebalanceListener 를 이용하면 리밸런스가 일어날 때 onPartitionRevokedBeforeCommit 와 AfterCommit 함수를 이용해서 300번째까지 처리한 오프셋으로 수동 커밋을 해줄 수 있을 것 같던데요.   궁금한 것은 현재 300번째까지 처리했다라는 오프셋 값을 어떻게 얻을 수 있는지 모르겠습니다. onPartitionRevokedBeforeCommit 의 인자로 넘어오는 Consumer 객체나 TopicPartition 객체에는 500개 레코드를 Poll 해온 시점의 offset 값은 있지만 현재 처리한 시점의 offset 값은 없는 것 같더라고요.   강사님 혹시 답을 알고 계실까요?  

결국 싱글톤 컨테아너(스프링컨테이너)는 싱글톤 객체와 같이 1개의 객체를 공유하는 형식입니다 그런데 싱글톤 컨테이너는 싱글톤 객체의 단점을 가지지 않습니다. 1. 이게 어떻게 가능한건가요? 싱글톤 패턴을 구현하는 코드 자체가 많이 들어간다. -> 스프링빈으로 등록하면 코드를 추가하지 않아도 되니 이 단점은 없어집니다 내부 속성을 변경하거나 초기화 하기 어렵다. -> 2. public으로 해당 객체를 얻어올 수 있으니 내부 속성 변경할 수 있지않나요? 초기화는 안되지만요.. private 생성자로 자식 클래스를 만들기 어렵다. -> 3. 싱글톤 컨테이너는 private생성자를 사용하지 않는건가요?4.  싱글톤 객체를사용하면 DIP를 위반해서 싱글톤 객체말고 싱글톤 컨테이너를 사용한대요. 하지만 APPCONFIG를 사용하면 DIP를 위반하는것을 피할 수 있거든요? 그럼에도 불구하고 싱글톤 객체는 단점이 있는 것 같은데..어떤점이 문제인건가요?

로드맵 할인 쿠폰을 발급 받았는데요, 각 강의가 수강기한이 3개월, 3개월, 2개월 입니다. 각 강의 수강기한이 짧아 해당 기한 안에 전체 강의를 들을 수도 없을 듯 하고, 필기/실기 시험으로 나눠져 있는 강의라 급박하게 들을 필요도 없는 강의인데요, 혹시 일시정지 기능은 없는 걸까요?

강의 마다 강의자료를 다운받아야 됩니다.   해당 강의 대한 전체 자료를 하단 메일로 보내주시면 강의보면서 참고 하도록 하겠습니다.   메일 주소 : kjw@eugenes.co.kr   감사합니다.

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]여기에 질문 내용을 남겨주세요. 먼저 강의 정말 잘보고 있습니다. argumentMessage() 테스트에 결과가  org.opentest4j.AssertionFailedError:  Expecting:  <"안녕 Spring"> to be equal to:  <"안녕 spring"> but was not. Expected :"안녕 spring" Actual   :"안녕 Spring" 이렇게 나오는대 무었이 때문에 테스트가 실패하는지 궁금합니다.!   @Testvoid argumentMessage(){ String message = ms.getMessage("hello.name", new Object[]{"Spring"}, null); assertThat(message).isEqualTo("안녕 spring");}

(사진)

해당 오류 해결이 안됩니다 ....

  안녕하세요. 현재 drf 를 사용하여 api 개발을 공부중입니다. 현재 1:n 관계인 두개의 테이블에서 N측 테이블의 데이터를 저장할 때 기존에 존재하던 1측 테이블의 레코드와 관계를 생성하여 매핑하고자 합니다. 이런 저런 방법을 계속 시도하였으나 참조하는 테이블의 객체를 알맞게 매핑하는데 자꾸 실패하여 질문을 남깁니다. class Company(models.Model): company_name = models.CharField(max_length=30) nationality = models.CharField(max_length=20) region = models.CharField(max_length=40) class Recruitment(models.Model): company = models.ForeignKey(Company, on_delete=models.CASCADE) position = models.CharField(max_length=20) reward = models.IntegerField() info = models.TextField() skill = models.CharField(max_length=30) Company 모델과 이를 참조하는 Recruitment 모델입니다 class CompanySerializer(serializers.ModelSerializer): class Meta: model = Company fields = '__all__' class RecruitmentSerializer(serializers.ModelSerializer): company = CompanySerializer() class Meta: model = Recruitment fields = '__all__' depth = 1 각 모델의 serializer입니다, class RecruitmentListView(APIView): def post(self, request): company_obj = Company.objects.get(pk=request.data.get('company')['id']) #1. 참조하는 company 객체를 찾아 새로운 Recruitment 객체를 생성하고, company 객체를 연결지어 serialize한다 #2. RecruitmentSerializer의 is_valid 혹은 다른 메소드를 오버라이딩하여 request를 serializer로 전달하여 저장한다 #기타 등등 if serializer.is_valid(): serializer.save() return Response(serializer.data, status=status.HTTP_201_CREATED) return Response(status=status.HTTP_400_BAD_REQUEST) 공식 문서, 유튜브 영상, 외국 사이트등을 찾아보았지만 기존에 존재하던 테이블을 참조하며 새로운 객체를 저장하는 방법이 있질 않더군요... 혹시 해결 방법을 아시면 답변 부탁드리겠습니다. 참고로 request는 { "company": { "id": 1, "company_name": "company1", "nationality": "korea", "region": "seoul" }, "position": "백엔드", "reward": 100000, "info": "test", "skill": "django" } 이런식으로 생각하고 있습니다