feat: 테이블 더미데이터 개수를 늘리기위한 코드추가

src/main/java/com/example/inflearn/common/PostHashtagRepository.java

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+package com.example.inflearn.common;
+
+import com.example.inflearn.domain.post.domain.PostHashtag;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PostHashtagRepository extends JpaRepository<PostHashtag, Long> {
+
+}

src/main/java/com/example/inflearn/common/PostInitializer.java

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+package com.example.inflearn.common;
+
+import com.example.inflearn.domain.comment.Comment;
+import com.example.inflearn.domain.hashtag.Hashtag;
+import com.example.inflearn.domain.like.Like;
+import com.example.inflearn.domain.member.Member;
+import com.example.inflearn.domain.post.domain.Post;
+import com.example.inflearn.domain.post.domain.PostHashtag;
+import com.example.inflearn.infra.repository.comment.CommentRepository;
+import com.example.inflearn.infra.repository.like.LikeRepository;
+import com.example.inflearn.infra.repository.member.MemberRepository;
+import com.example.inflearn.infra.repository.post.PostRepository;
+import jakarta.annotation.PostConstruct;
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+@Profile("dev")
+@RequiredArgsConstructor
+@Component
+public class PostInitializer {
+
+    private final MemberRepository memberRepository;
+    private final PostRepository postRepository;
+    private final PostHashtagRepository postHashtagRepository;
+    private final LikeRepository likeRepository;
+    private final CommentRepository commentRepository;
+    int hashtagCount = 0;
+    List<String> lists = List.of(
+            "java", "spring", "spring boot", "aws", "docker",
+            "elastic search", "백엔드", "로드맵","redis","kafka","쿠버네티스","msa","DB",
+            "프론트엔드", "ci", "cd", "배포", "무중단", "nest", "타입스크립트", "node", "git",
+            "서버", "데브옵스", "알고리즘", "자료구조", "운영체제", "스터디", "리액트", "이펙티브 자바",
+            "typescript", "nestjs", "rest", "python", "김영한", "백기선", "주니어", "신입", "C",
+            "C++", "바킹독", "코딩테스트", "Ruby", "코테", "온라인", "오프라인", "디스코드"
+            , "경력", "재직자", "이직준비", "디앱", "블록체인", "솔리디티", "각자도생", "sql", "데브옵스", "퍼블리셔",
+            "자바스크립트", "웹개발", "CS", "네트워크", "면접", "인터뷰","딥러닝","수학","1달","정처기","정보처리기사","기사시험",
+            "벌칙비","html","css","jenkins","github actions", "언리얼","tdd","클린코드","협업","프로젝트","백준","릿코드","자바의정석",
+            "기초","중급","고급","JPA","DBMS","real mysql","우테코","mvc","프리코스","이직러","모각코코","커피챗","비어챗","취준생위주",
+            "경력자위주","코테초보만","코테중수이상","코테고수들만","해외취업","배포자동화","유료스터디"
+    );
+
+
+    @PostConstruct
+    public void init() {
+        int batchSize = 1000;
+        int numberOfMemberToGenerate = 100000;
+        int postsPerMember = 20;
+
+        for (int i = 1; i < numberOfMemberToGenerate; i+=batchSize) {
+            List<Member> members = generateMembers(i, batchSize);
+            memberRepository.saveAll(members);
+
+            List<Post> posts = new ArrayList<>();
+            for (Member member : members) {
+                posts.addAll(generatePostsForMember(postsPerMember, member)); // 1000 x 3
+            }
+            postRepository.saveAll(posts);
+
+
+            List<Like> likes = new ArrayList<>();
+            for (Post post : posts) {
+                likes.addAll(generateLikesForPost(post, members)); // 2000 x 3 = 6,000,000
+            }
+                likeRepository.saveAll(likes);
+
+            List<Comment> comments = new ArrayList<>();
+            for (Post post : posts) {
+                comments.addAll(generateCommentsForPost(post, members)); // 2000 x 3
+            }
+                commentRepository.saveAll(comments);
+
+
+            List<PostHashtag> postHashtags = new ArrayList<>();
+            for (Post post : posts) {
+                postHashtags.addAll(generatePostHashtagsForPost(post));
+            }
+
+            postHashtagRepository.saveAll(postHashtags);
+        }
+    }
+
+    private List<Like> generateLikesForPost(Post post, List<Member> members) {
+        List<Like> likes = new ArrayList<>();
+        SecureRandom secureRandom = new SecureRandom();
+        int randomIndex = secureRandom.nextInt(3);
+        int memberIndex = secureRandom.nextInt(999);
+        for (int i = 1; i <= randomIndex; i++) {
+            likes.add(Like.builder()
+                    .member(members.get(memberIndex))
+                    .post(post)
+                    .build());
+        }
+        return likes;
+    }
+
+    private List<Comment> generateCommentsForPost(Post post, List<Member> members) {
+        List<Comment> comments = new ArrayList<>();
+        SecureRandom secureRandom = new SecureRandom();
+        int randomCommentCount = secureRandom.nextInt(3);
+        int memberIndex = secureRandom.nextInt(999);
+        for (int i = 1; i <= randomCommentCount; i++) {
+            comments.add(Comment.builder()
+                    .member(members.get(memberIndex))
+                    .post(post)
+                    .contents("댓글 i")
+                    .build());
+        }
+        return comments;
+    }
+
+    private List<PostHashtag> generatePostHashtagsForPost(Post post) {
+        List<PostHashtag> postHashtags = new ArrayList<>();
+        Hashtag hashtag = Hashtag.createHashtag("javavjavajavzza55123123ㅁ12321" + hashtagCount);
+        Hashtag hashtag2 = Hashtag.createHashtag("sprsfassaingzz55123213ㅁㄴㅇ13ㅣㅏㅣ" + hashtagCount);
+        postHashtags.add(PostHashtag.createPostHashtag(post, hashtag));
+        postHashtags.add(PostHashtag.createPostHashtag(post, hashtag2));
+        hashtagCount++;
+        return postHashtags;
+    }
+
+    private List<Post> generatePostsForMember(int numberOfPosts, Member member) {
+        List<Post> posts = new ArrayList<>();
+        for (int i = 1; i <= numberOfPosts; i++) {
+            SecureRandom secureRandom = new SecureRandom();
+            int randomIndex = secureRandom.nextInt(lists.size());
+            String randomHashtag = lists.get(randomIndex);
+            String postTitle = randomHashtag + "_" + i;
+            String postContents = randomHashtag + "_" + i;
+            posts.add(Post.builder()
+                    .title(postTitle)
+                    .contents(postContents)
+                    .member(member)
+                    .build());
+        }
+        return posts;
+    }
+
+    private List<Member> generateMembers(int start, int count) {
+        List<Member> members = new ArrayList<>();
+        for (int i = start; i < start + count; i++) {
+            members.add(Member.builder()
+                    .email(i + "user12321sd1244zzㅓ[email protected]")
+                    .password("12345678")
+                    .build());
+        }
+        return members;
+    }
+}