refactor: NewsEntity-FileEntity 양방향 관계설정

Author: dohy-eon

src/main/java/dmu/dasom/api/domain/news/entity/NewsEntity.java

@@ -2,10 +2,12 @@
 
 import dmu.dasom.api.domain.common.BaseEntity;
 import dmu.dasom.api.domain.news.dto.NewsResponseDto;
+import dmu.dasom.api.global.file.entity.FileEntity;
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.persistence.*;
 import lombok.*;
 
+import java.util.ArrayList;
 import java.util.List;
 
 @Getter
@@ -43,4 +45,7 @@ public NewsResponseDto toResponseDto() {
         return new NewsResponseDto(id, title, content, getCreatedAt(), imageUrls);
     }
 
+    @OneToMany(mappedBy = "news", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<FileEntity> images = new ArrayList<>();
+
 }

src/main/java/dmu/dasom/api/global/file/entity/FileEntity.java

@@ -1,5 +1,6 @@
 package dmu.dasom.api.global.file.entity;
 
+import dmu.dasom.api.domain.news.entity.NewsEntity;
 import jakarta.persistence.*;
 import lombok.*;
 
@@ -28,4 +29,7 @@ public class FileEntity {
     @Column(nullable = false)
     private Long fileSize;
 
+    @ManyToOne
+    @JoinColumn(name = "news_id")
+    private NewsEntity news;
 }