feat: commentCustomRespoitory 생성

server/src/main/java/com/main36/pikcha/domain/comment/repository/CommentCustomRepository.java

@@ -0,0 +1,27 @@
+package com.main36.pikcha.domain.comment.repository;
+
+import com.main36.pikcha.domain.comment.entity.Comment;
+import com.main36.pikcha.domain.post.entity.Post;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import org.springframework.stereotype.Repository;
+import java.util.List;
+
+import static com.main36.pikcha.domain.comment.entity.QComment.comment;
+
+@Repository
+public class CommentCustomRepository {
+    private JPAQueryFactory jpaQueryFactory;
+
+    public CommentCustomRepository(JPAQueryFactory jpaQueryFactory) {
+        this.jpaQueryFactory = jpaQueryFactory;
+    }
+
+    public List<Comment> findCommentByPost(Post post){
+        return jpaQueryFactory.selectFrom(comment)
+                .leftJoin(comment.parent)
+                .fetchJoin()
+                .where(comment.post.postId.eq(post.getPostId()))
+                .orderBy(comment.parent.commentId.asc().nullsFirst(), comment.createdAt.asc())
+                .fetch();
+    }
+}

server/src/main/java/com/main36/pikcha/global/config/QueryDslConfig.java

@@ -0,0 +1,19 @@
+package com.main36.pikcha.global.config;
+
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+@Configuration
+public class QueryDslConfig {
+    @PersistenceContext
+    private EntityManager entityManager;
+
+    @Bean
+    public JPAQueryFactory jpaQueryFactory(){
+        return new JPAQueryFactory(entityManager);
+    }
+}