프로젝트 생성과 환경 설정

buildscript {
    ext {
        queryDslVersion = "5.0.0"
    }
}

plugins {
    id 'org.springframework.boot' version '2.6.7'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    //querydsl 추가
    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'

    //querydsl 추가
    implementation "com.querydsl:querydsl-jpa:${queryDslVersion}"
    implementation "com.querydsl:querydsl-apt:${queryDslVersion}"

    compileOnly 'org.projectlombok:lombok'
    runtimeOnly 'com.h2database:h2'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

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

// querydsl 추가 시작
def querydslDir = "$buildDir/generated/querydsl"

querydsl {
    jpa = true
    querydslSourcesDir = querydslDir
}

sourceSets {
    main.java.srcDir querydslDir
}

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
    querydsl.extendsFrom compileClasspath
}

compileQuerydsl {
    options.annotationProcessorPath = configurations.querydsl
}
// querydsl 추가 끝

package study.querydsl;

import com.querydsl.jpa.impl.JPAQueryFactory;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.transaction.annotation.Transactional;
import study.querydsl.entitiy.Hello;
import study.querydsl.entitiy.QHello;

import javax.persistence.EntityManager;

import static org.junit.jupiter.api.Assertions.*;

@SpringBootTest
@Transactional
class QuerydslApplicationTest {

    @Autowired
    EntityManager em;

    @Test
    void contextLoads() {
        Hello hello = new Hello();
        em.persist(hello);

        JPAQueryFactory query = new JPAQueryFactory(em);
        QHello qHello = QHello.hello; //Querydsl Q타입 동작 확인
        Hello result = query
                .selectFrom(qHello)
                .fetchOne();

        Assertions.assertThat(result).isEqualTo(hello);
        //lombok 동작 확인 (hello.getId())
        Assertions.assertThat(result.getId()).isEqualTo(hello.getId());
    }

}

spring:
  datasource:
    url: jdbc:h2:tcp://localhost/~/jpashop
    username: sa
    password : 1
    driver-class-name: org.h2.Driver

  jpa:
    hibernate:
      ddl-auto: create
    properties:
      hibernate:
       # show_sql: true
        format_sql: true

logging:
  level:
    org.hibernate.SQL: debug
    #org.hibernate.type: trace

//쿼리 로그
    implementation 'com.github.gavlyukovskiy:p6spy-spring-boot-starter:1.5.8'