@@ -1,40 +1,108 @@
 package com.ll.nbe342team8.domain.book.book.entity;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.ll.nbe342team8.domain.book.book.dto.BookPatchRequestDto;
 import com.ll.nbe342team8.domain.book.category.entity.Category;
+import com.ll.nbe342team8.domain.book.review.entity.Review;
 import com.ll.nbe342team8.global.jpa.entity.BaseTime;
-import jakarta.persistence.Column;
-import jakarta.persistence.Entity;
-import jakarta.persistence.FetchType;
-import jakarta.persistence.ManyToOne;
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotNull;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import java.time.LocalDate;
+import java.util.List;
+
 @Entity
 @Getter
 @Builder
 @NoArgsConstructor
 @AllArgsConstructor
 public class Book extends BaseTime {
 
-    @Column(name="title" ,nullable = true,length = 100)
+    @Column(length = 100)
+    @NotNull
     private String title;      // 제목
 
-    @Column(name = "author", nullable = true)
+    @NotNull
     private String author;     // 저자
 
-    @Column(name = "price", nullable = true)
-    private int price;         // 가격
+    @Column(name = "isbn")
+    private String isbn;       // ISBN
+
+    @NotNull
+    private String isbn13;     // ISBN13
+
+    @NotNull
+    private LocalDate pubDate;      //출판일
+
+    @NotNull
+    private int priceStandard;         // 정가
+
+    @NotNull
+    private int pricesSales;         // 판매가
 
-    @Column(name = "stock", nullable = true)
+    @NotNull
     private int stock;         // 재고
 
-    @Column(name = "rating", nullable = true)
+    @NotNull
+    private int status;         // 판매 상태
+
     private float rating;      // 평점
 
-    private String image;      // 이미지 URL
+    private String toc;        // 목차
+
+    private String coverImage;            // 커버 이미지 URL
+
+    private String description;           // 상세페이지 글
+
+    @Column(name = "description2")
+    private String descriptionImage;
 
+    private long salesPoint;
+
+    private long reviewCount;
+
+    private String publisher;
+
+    @JsonIgnore
     @ManyToOne(fetch = FetchType.LAZY)
-    private Category category; // 카테고리
+    @NotNull
+    @JoinColumn(name = "category_id") // @@@실행 이상하면 지워보기@@@
+    private Category categoryId; // 카테고리
+
+    @OneToMany(mappedBy = "book", fetch = FetchType.LAZY)
+    private List<Review> review;
+
+    public void createReview(float rating) {
+        this.reviewCount++;
+        this.rating += rating;
+    }
+
+    public void deleteReview(float rating) {
+        this.reviewCount--;
+        this.rating -= rating;
+    }
+
+    public void update(BookPatchRequestDto requestDto) {
+        if (requestDto.getTitle() != null) this.title = requestDto.getTitle();
+        if (requestDto.getAuthor() != null) this.author = requestDto.getAuthor();
+        if (requestDto.getIsbn() != null) this.isbn = requestDto.getIsbn();
+        if (requestDto.getIsbn13() != null) this.isbn13 = requestDto.getIsbn13();
+        if (requestDto.getPubDate() != null) this.pubDate = requestDto.getPubDate();
+        if (requestDto.getPriceStandard() != null) this.priceStandard = requestDto.getPriceStandard();
+        if (requestDto.getPriceSales() != null) this.pricesSales = requestDto.getPriceSales();
+        if (requestDto.getStock() != null) this.stock = requestDto.getStock();
+        if (requestDto.getStatus() != null) this.status = requestDto.getStatus();
+        if (requestDto.getRating() != null) this.rating = requestDto.getRating();
+        if (requestDto.getToc() != null) this.toc = requestDto.getToc();
+        if (requestDto.getCover() != null) this.coverImage = requestDto.getCover();
+        if (requestDto.getDescription() != null) this.description = requestDto.getDescription();
+        if (requestDto.getDescriptionImage() != null) this.descriptionImage = requestDto.getDescriptionImage();
+        if (requestDto.getCategoryId() != null) this.categoryId = requestDto.getCategoryId();
+    }
+
+
 }

리뷰: (좀 챌린징한 부분이에요.)
일일히 반복문 안 쓰고 update 할 수 있을까요?