[JPA]双方向マッピングmappedBy

  @Entity
  @Getter
  @NoArgsConstructor
  public class Book {
      @Id
      @Column(name = "ISBN")
      private String isbn;
  
      @Column(name = "BOOK_NAME")
      private String bookName;
  
      @Column(name = "AUTHOR")
      private String author;
  
      @Column(name = "PUBLISHER")
      private String publisher;
  
      @Column(name = "KDC")
      private String kdc;
  
      @Column(name = "CATEGORYy")
      private String category;
  
      @Column(name = "KEYWORD")
      private String keyword;
  
      @Column(name = "BOOK_IMAGE")
      private String img;
  
      @OneToMany(mappedBy = "book")
      private List<BookReview> bookReviewList = new ArrayList<>();
 
  }

  @Getter
  @Entity
  @NoArgsConstructor
  public class BookReview {
      @Id
      @GeneratedValue
      private long reviewNo;
  
      private int rating;
      private String reviewContents;
      private LocalDateTime createDate;
      private int declaration;
  
      //NORMAl, BLIND
      @Enumerated(EnumType.STRING)
      private ReviewStatus reviewStatus;
  
      @ManyToOne(fetch = FetchType.LAZY)
      @JoinColumn(name = "isbn")
      private Book book;
  }