spring:
  datasource:
    url: jdbc:postgresql://localhost:5432/jpa_study
    username: jpa_user
    password: jpa_user
    driver-class-name: org.postgresql.Driver

mybatis:
  # 지정한 패키지 경로 내의 도메인 객체 mapping 시 패키지 경로 생략 가능
  type-aliases-package: package path
  configuration:
    # camel-case 변환
    map-underscore-to-camel-case: true
  # 지정한 경로 내 xml 파일을 mapper xml로 인식  
  mapper-locations: classpath:mapper/**/*.xml

build.gradle 설정

plugins {
    id 'org.springframework.boot' version '2.6.5'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
    implementation 'org.springframework.boot:spring-boot-starter-web'

    // MyBatis
    implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:2.2.2'


    runtimeOnly 'org.postgresql:postgresql'

    testImplementation 'org.springframework.boot:spring-boot-starter-test'

    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'

    //테스트에서 lombok 사용
    testCompileOnly 'org.projectlombok:lombok'
    testAnnotationProcessor 'org.projectlombok:lombok'
}

tasks.named('test') {
    useJUnitPlatform()
}

spring:
  datasource:
    url: jdbc:postgresql://localhost:5432/jpa_study
    username: jpa_user
    password: jpa_user
    driver-class-name: org.postgresql.Driver

# JdbcTemplate logging level
logging:
  level:
    org:
      springframework:
        jdbc: debug

build.gradle 설정

plugins {
    id 'org.springframework.boot' version '2.6.5'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    // JdbcTemplate
    implementation 'org.springframework.boot:spring-boot-starter-jdbc'

    runtimeOnly 'org.postgresql:postgresql'

    testImplementation 'org.springframework.boot:spring-boot-starter-test'

    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'

    //테스트에서 lombok 사용
    testCompileOnly 'org.projectlombok:lombok'
    testAnnotationProcessor 'org.projectlombok:lombok'
}

tasks.named('test') {
    useJUnitPlatform()
}

spring:
  datasource:
    url: jdbc:postgresql://localhost:5432/jpa_study
    username: jpa_user
    password: jpa_user
    driver-class-name: org.postgresql.Driver

  jpa:
    hibernate:
      ddl-auto: create
    properties:
      hibernate:
        #        show-sql: true
        format_sql: true
        default_batch_fetch_size: 100
    database-platform: org.hibernate.dialect.PostgreSQLDialect

logging:
  level:
    org.hibernate.SQL: debug

build.gradle 설정

plugins {
    id 'org.springframework.boot' version '2.7.1'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'com.ewerk.gradle.plugins.querydsl' version '1.0.10'
    id 'java'
}

group = 'study'
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-web'

    implementation 'com.querydsl:querydsl-jpa'
    annotationProcessor "com.querydsl:querydsl-apt:${dependencyManagement.importedProperties['querydsl.version']}:jpa"
    annotationProcessor "jakarta.persistence:jakarta.persistence-api"
    annotationProcessor "jakarta.annotation:jakarta.annotation-api"

    compileOnly 'org.projectlombok:lombok'
    runtimeOnly 'org.postgresql:postgresql'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'

    testCompileOnly 'org.projectlombok:lombok'
    testAnnotationProcessor 'org.projectlombok:lombok'
}

tasks.named('test') {
    useJUnitPlatform()
}

def querydslDir = "$buildDir/generated/querydsl"

querydsl {
    jpa = true
    querydslSourcesDir = querydslDir
}

sourceSets {
    main.java.srcDir querydslDir
}

configurations {
    querydsl.extendsFrom compileClasspath
}

compileQuerydsl {
    options.annotationProcessorPath = configurations.querydsl
}

build.gradle 최신 설정

plugins {
    id 'org.springframework.boot' version '2.7.2'
    id 'io.spring.dependency-management' version '1.0.12.RELEASE'
    id 'java'
}

group = 'com.sonlog'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '17'

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-validation'

    // querydsl 설정 -----------------
    implementation 'com.querydsl:querydsl-core'
    implementation 'com.querydsl:querydsl-jpa'

    annotationProcessor "com.querydsl:querydsl-apt:${dependencyManagement.importedProperties['querydsl.version']}:jpa"
    annotationProcessor 'jakarta.persistence:jakarta.persistence-api'
    annotationProcessor 'jakarta.annotation:jakarta.annotation-api'
    // ------------------------------

    compileOnly 'org.projectlombok:lombok'
    runtimeOnly 'org.postgresql:postgresql'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    testCompileOnly 'org.projectlombok:lombok'
    testAnnotationProcessor 'org.projectlombok:lombok'

}

tasks.named('test') {
    useJUnitPlatform()
}

spring:
  datasource:
    url: jdbc:postgresql://localhost:5432/jpa_study
    username: jpa_user
    password: jpa_user
    driver-class-name: org.postgresql.Driver

  jpa:
    hibernate:
      ddl-auto: create
    properties:
      hibernate:
        #        show-sql: true
        format_sql: true
        default_batch_fetch_size: 100
    database-platform: org.hibernate.dialect.PostgreSQLDialect

logging:
  level:
    org.hibernate.SQL: debug

build.gradle 설정

plugins {
    id 'org.springframework.boot' version '2.7.0'
    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-web'
    implementation 'org.springframework.boot:spring-boot-devtools'
    implementation 'com.github.gavlyukovskiy:p6spy-spring-boot-starter:1.8.0'
    compileOnly 'org.projectlombok:lombok'
    runtimeOnly 'org.postgresql:postgresql'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'

    testCompileOnly 'org.projectlombok:lombok'
    testAnnotationProcessor 'org.projectlombok:lombok'
}

tasks.named('test') {
    useJUnitPlatform()
}

JPA 프로젝트에 엔티티를 영속화 및 커밋 시도하니 다음과 같은 에러가 발생하였음

구글링 결과 CascadeType.ALL 옵션과 관련있는 듯 해보였으나 내 프로젝트에는 관련 옵션이 존재하지 않았음

만일 본인과 같이 CascadeType.ALL 관련 옵션이 없으나 동일한 오류가 발생하였다면 엔티티 클래스에 @Id를 부여한 필드에 @GeneratedValue를 작성하여 AUTO, SEQUENCE, IDENTITY 전략 등 데이터베이스에게 key 값을 자동 생성하도록 하는 전략을 선택하였으면서 엔티티 객체 생성 시 Id에 해당하는 필드에 직접 값을 입력하지 않았는지 확인

@Entity
public class Member {

    // 데이터베이스에 키 생성 위임 전략을 취함
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    //...
}

Member member = new Member();
// 데이터베이스에 키 생성 전략을 취했으나 엔티티를 생성하면서 key 값을 수동으로 부여함
member.setId(1L);
member.setName("hello");

다음과 같이 @Id 필드에 수동으로 키 값을 부여하게 되면 에러가 발생하였음