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feat: post 도메인 추가
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‎src/main/java/com/back/domain/post/category/entity/Category.java‎

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package com.back.domain.post.category.entity;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.EntityListeners;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.Table;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import lombok.Setter;
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import org.springframework.data.jpa.domain.support.AuditingEntityListener;
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@Entity
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@Getter
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@Setter
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@Table(name = "category")
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@EntityListeners(AuditingEntityListener.class)
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@NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
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@AllArgsConstructor
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@Builder
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public class Category {
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// 각 게시글 카테고리을 구분하는 유일한 번호
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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@Column(name = "id")
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private Long id;
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// 카테고리 이름
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@Column(name = "name", nullable = false, unique = true, length = 50)
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private String name;
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// 카테고리 설명
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@Column(name = "description", length = 200)
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private String description;
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}

‎src/main/java/com/back/domain/post/category/repository/CategoryRepository.java‎

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package com.back.domain.post.category.repository;
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import com.back.domain.post.category.entity.Category;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.stereotype.Repository;
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@Repository
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public interface CategoryRepository extends JpaRepository<Category, Long> {
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}

‎src/main/java/com/back/domain/post/post/controller/PostController.java‎

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package com.back.domain.post.post.controller;
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import com.back.domain.post.post.dto.request.PostRequestDto;
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import com.back.domain.post.post.dto.response.PostResponseDto;
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import com.back.domain.post.post.entity.Post;
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import com.back.domain.post.post.service.PostService;
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import com.back.global.rsData.RsData;
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import java.util.List;
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import lombok.RequiredArgsConstructor;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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@RestController
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@RequestMapping("/api/posts")
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@RequiredArgsConstructor
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public class PostController {
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private final PostService postService;
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/**
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* 게시글 작성 API
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* @param postRequestDto 게시글 작성 요청 DTO
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* @return 작성된 게시글 정보
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*/
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@PostMapping
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public RsData<PostResponseDto> createPost(
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@RequestBody PostRequestDto postRequestDto
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) {
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return RsData.successOf(postService.createPost(postRequestDto)); // code=200, message="success"
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}
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/**
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* 게시글 다건 조회 API
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* @return 모든 게시글 리스트
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*/
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@GetMapping
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public RsData<List<Post>> getAllPosts() {
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List<Post> posts = postService.getAllPosts();
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return RsData.successOf(posts); // code=200, message="success"
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}
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}

‎src/main/java/com/back/domain/post/post/dto/request/PostRequestDto.java‎

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package com.back.domain.post.post.dto.request;
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import java.util.List;
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public record PostRequestDto(
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Long categoryId,
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String title,
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String content,
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String userNickName,
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String imageUrl,
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List<String> tags
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) {
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}

‎src/main/java/com/back/domain/post/post/dto/response/PostResponseDto.java‎

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package com.back.domain.post.post.dto.response;
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import com.back.domain.post.post.entity.Post;
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import com.back.domain.post.post.enums.PostStatus;
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import java.time.LocalDateTime;
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import java.util.List;
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public record PostResponseDto(
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Long postId,
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String categoryName,
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String userNickName,
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LocalDateTime createdAt,
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LocalDateTime updatedAt,
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PostStatus status,
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String title,
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String content,
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String imageUrl,
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List<String> tags,
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Integer likeCount,
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Integer commentCount,
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Integer viewCount
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) {
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public PostResponseDto(Post post) {
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this(
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post.getId(),
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post.getCategory().getName(),
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post.getUser().getNickname(),
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post.getCreatedAt(),
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post.getUpdatedAt(),
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post.getStatus(),
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post.getTitle(),
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post.getContent(),
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post.getImageUrl(),
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post.getPostTags().stream()
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.map(postTag -> postTag.getTag().getName())
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.toList(),
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post.getLikeCount(),
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post.getCommentCount(),
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post.getViewCount()
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);
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}
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}

‎src/main/java/com/back/domain/post/post/entity/Post.java‎

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package com.back.domain.post.post.entity;
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import com.back.domain.post.category.entity.Category;
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import com.back.domain.post.post.enums.PostStatus;
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import com.back.domain.user.entity.User;
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import jakarta.persistence.CascadeType;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.EntityListeners;
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import jakarta.persistence.EnumType;
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import jakarta.persistence.Enumerated;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.JoinColumn;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.OneToMany;
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import jakarta.persistence.Table;
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import java.time.LocalDateTime;
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import java.util.ArrayList;
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import java.util.List;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import lombok.Setter;
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import org.springframework.data.annotation.CreatedDate;
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import org.springframework.data.annotation.LastModifiedDate;
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import org.springframework.data.jpa.domain.support.AuditingEntityListener;
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@Entity
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@Getter
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@Setter
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@Table(name = "post")
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@EntityListeners(AuditingEntityListener.class)
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@NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
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@AllArgsConstructor
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@Builder
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public class Post {
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// 각 게시글을 구분하는 유일한 번호
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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@Column(name = "id")
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private Long id;
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// 해당 게시글의 카테고리 고유 식별자
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "category_id")
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private Category category;
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// 해당 게시글을 작성한 유저의 고유 식별자
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "user_id")
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private User user;
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// 게시글 작성 날짜
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@CreatedDate
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private LocalDateTime createdAt;
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// 게시글 수정 날짜
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@LastModifiedDate
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private LocalDateTime updatedAt;
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// 게시글 게시 상태 (기본값: 공개)
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@Builder.Default
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@Enumerated(EnumType.STRING)
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@Column(name = "status", nullable = false)
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private PostStatus status = PostStatus.PUBLIC;
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// 게시글 제목
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@Column(name = "title", nullable = false, length = 100)
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private String title;
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// 게시글 내용
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@Column(name = "content", nullable = false, columnDefinition = "TEXT")
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private String content;
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// 게시글 이미지 URL
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@Column(name = "image_url")
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private String imageUrl;
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@OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
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private List<PostTag> postTags = new ArrayList<>();
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// 게시글 추천 수 (기본값: 0)
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@Builder.Default
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@Column(name = "like_count", nullable = false)
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private Integer likeCount = 0;
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// 게시글 댓글 수
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@Column(name = "comment_count")
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private Integer commentCount;
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// 게시글 조회 수
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@Column(name = "view_count")
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private Integer viewCount;
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public void addTag(Tag tag) {
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PostTag postTag = PostTag.create(this, tag);
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this.postTags.add(postTag);
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}
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}

‎src/main/java/com/back/domain/post/post/entity/PostTag.java‎

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package com.back.domain.post.post.entity;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.EntityListeners;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.JoinColumn;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.Table;
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import lombok.AccessLevel;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import org.springframework.data.jpa.domain.support.AuditingEntityListener;
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@Entity
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@Getter
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@Table(name = "post_tag")
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@EntityListeners(AuditingEntityListener.class)
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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public class PostTag {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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@Column(name = "id")
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private Long id;
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "post_id")
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private Post post;
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "tag_id")
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private Tag tag;
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@Builder
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public PostTag(Post post, Tag tag) {
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this.post = post;
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this.tag = tag;
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}
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// 정적 팩토리 메서드
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public static PostTag create(Post post, Tag tag) {
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return PostTag.builder()
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.post(post)
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.tag(tag)
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.build();
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}
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}

‎src/main/java/com/back/domain/post/post/entity/Tag.java‎

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package com.back.domain.post.post.entity;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.Id;
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import jakarta.persistence.Table;
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import lombok.AccessLevel;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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@Entity
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@Getter
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@Table(name = "tag")
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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@AllArgsConstructor
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@Builder
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public class Tag { // Tag는 Post와 직접적인 관계를 맺지 않습니다.
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@Id
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@GeneratedValue
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@Column(name = "id")
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private Long id;
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@Column(unique = true, nullable = false)
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private String name;
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}

‎src/main/java/com/back/domain/post/post/enums/PostStatus.java‎

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package com.back.domain.post.post.enums;
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import lombok.Getter;
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import lombok.RequiredArgsConstructor;
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@Getter
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@RequiredArgsConstructor
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public enum PostStatus {
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PUBLIC("공개", "모든 사용자가 볼 수 있는 상태"),
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PRIVATE("비공개", "작성자만 볼 수 있는 상태"),
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DELETED("삭제됨", "삭제 처리된 게시글 상태");
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private final String title;
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private final String description;
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}

‎src/main/java/com/back/domain/post/post/repository/PostRepository.java‎

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package com.back.domain.post.post.repository;
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import com.back.domain.post.post.entity.Post;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.stereotype.Repository;
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@Repository
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public interface PostRepository extends JpaRepository<Post, Long> {
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}

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