개발하고 있는 프로젝트에 Querydsl을 적용해보려고 테스트 중입니다.

Question

1. build.gradle에 설정 후 Q파일 생성까지 완료 2. 환경 설정 검증용 엔티티 생성 후 테스트 프로그램 완료 3. 테스트 실행 후 에러 발생 E:\workspace\ECS-server\ecs\build\generated\querydsl\com\weni\ecs\domain\QEduAcnt.java:16: error: cannot find symbol public class QEduAcnt extends EntityPathBase { ^ symbol: class EduAcnt 4. 에러를 찾을 수 없어서 해당 파알을 삭제 후 테스트 프로그램 실행 @Test void contextLoads () { JPAQueryFactory query = new JPAQueryFactory ( em ) ; QHello qHello = QHello. hello ; //Querydsl Q 타입 동작 확인 List < Hello > result = query .selectFrom ( qHello ) .fetch () ; System. out .println ( "result = " + result ) ; } 5. 테스트 성공 Hibernate : select hello0_ . id as id1_7_ from Hello hello0_ 2022 - 06 - 30 21 : 58 : 16.019 INFO 30456 --- [ Test worker ] jdbc . sqltiming : select hello0_ . id as id1_7_ from Hello hello0_ { executed in 2 msec} 2022 - 06 - 30 21 : 58 : 16.036 INFO 30456 --- [ Test worker] jdbc . resultsettable : |-------| |id1_7_ | |-------| | 1 | | 2 | | 3 | |-------| result = [ com . weni . ecs . domain . Hello @ 133fb509 , com . weni . ecs . domain . Hello @ bb0ca30 , com . weni . ecs . domain . Hello @ 6e6d544 ] Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0 . You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins . See https : //docs.gradle.org/7.2/userguide/command_line_interface.html#sec:command_line_warnings BUILD SUCCESSFUL in 15s 6 actionable tasks : 4 executed, 2 up-to- date 오후 9 : 58 : 16 : Execution finished ':test --tests "com.weni.ecs.domain.QuerydslApplicationTests.contextLoads"' . 6. 다시 테스트를 실행하면 다시 생성된 Q파일떄문에 또 에러 발생합니다. import java.math.BigDecimal; import javax.persistence.Entity; import javax.persistence.Table; import javax.persistence.Id; import javax.persistence.Column; import javax.persistence.PostLoad; import javax.persistence.PrePersist; import javax.persistence.PostPersist; import javax.persistence.PreUpdate; import javax.persistence.PostUpdate; import javax.persistence.PreRemove; import javax.persistence.PostRemove; // import org.springframework.beans.BeanUtils; import lombok.Getter; import lombok.NoArgsConstructor; import lombok.EqualsAndHashCode; import lombok.ToString; import lombok.Builder; @Entity @Table(name="EDU_ACNT") //--PRIMARY @Getter @NoArgsConstructor // (access = AccessLevel.PROTECTED) // AccessLevel.PUBLIC @EqualsAndHashCode // (of = {"email","name"}, callSuper = true, onParam = @__(@NonNull)) @ToString //(exclude = "password") // exclude 속성을 사용하면, 특정 필드를 toString() 결과에서 제외 public class EduAcnt { @Id // Integer @Column(name = "ACNT_NO", nullable = false) private Integer acntNo; //--null @Column(name = "BALANCE", precision = 18, scale = 0, nullable = false) private BigDecimal balance; //--null @Builder public EduAcnt(Integer acntNo, BigDecimal balance) { this.acntNo = acntNo; this.balance = balance; } //---------------------------------------------------- // Load/Persist/Update/Remove(조회/신규/수정/삭제) // Entity Pre/Post(이전/이후) 처리에 대한 정의(PreLoad는 없음) // * DB의 Trigger와 비슷한 JPA기능 //---------------------------------------------------- @PostLoad public void onPostLoad() { } @PrePersist public void onPrePersist() { } @PostPersist public void onPostPersist() { } @PreUpdate public void onPreUpdate() { } @PostUpdate public void onPostUpdate() { } @PreRemove public void onPreRemove() { } @PostRemove public void onPostRemove() { } }

김영한 · Answer

안녕하세요. 김기정님 Querydsl 설정이 버전이나 환경에 따라서 조금씩 달라집니다. 다음을 참고해주세요. 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' ext["hibernate.version"] = "5.6.5.Final" configurations { compileOnly { extendsFrom annotationProcessor } } repositories { mavenCentral() } dependencies { implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' implementation 'org.springframework.boot:spring-boot-starter-web' //JdbcTemplate 추가 //implementation 'org.springframework.boot:spring-boot-starter-jdbc' //MyBatis 추가 implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:2.2.0' //JPA, 스프링 데이터 JPA 추가 implementation 'org.springframework.boot:spring-boot-starter-data-jpa' //Querydsl 추가 implementation 'com.querydsl:querydsl-jpa' annotationProcessor "com.querydsl:querydsl-apt:${dependencyManagement.importedProperties['querydsl.version']}:jpa" annotationProcessor "jakarta.annotation:jakarta.annotation-api" annotationProcessor "jakarta.persistence:jakarta.persistence-api" //H2 데이터베이스 추가 runtimeOnly 'com.h2database:h2' compileOnly 'org.projectlombok:lombok' annotationProcessor 'org.projectlombok:lombok' testImplementation 'org.springframework.boot:spring-boot-starter-test' //테스트에서 lombok 사용 testCompileOnly 'org.projectlombok:lombok' testAnnotationProcessor 'org.projectlombok:lombok' } tasks.named('test') { useJUnitPlatform() } //Querydsl 추가, 자동 생성된 Q클래스 gradle clean으로 제거 clean { delete file('src/main/generated') }