@Override
 public BookModel selectBook(int id) {
   return create
       .select(
           BOOK.ID_BOOK,
           BOOK.TITLE,
           BOOK.SHORT_DESCRIPTION,
           BOOK.DATE_PUBLISH,
           PostgresDSL.arrayAgg(
                   concat(
                       AUTHOR.ID_AUTHOR,
                       val(","),
                       AUTHOR.FIRST_NAME,
                       val(","),
                       AUTHOR.SECOND_NAME))
               .as("authors"))
       .from(AUTHOR)
       .join(AUTHOR_BOOK)
       .on(AUTHOR_BOOK.ID_AUTHOR.equal(AUTHOR.ID_AUTHOR))
       .join(BOOK)
       .on(BOOK.ID_BOOK.equal(AUTHOR_BOOK.ID_BOOK))
       .where(BOOK.STATUS.equal(true))
       .and(BOOK.ID_BOOK.equal(id))
       .groupBy(BOOK.ID_BOOK)
       .fetchOneInto(BookModel.class);
 }
 @Override
 public List<BookModel> selectAll() {
   List<BookModel> books =
       create
           .select(
               BOOK.ID_BOOK,
               BOOK.TITLE,
               BOOK.SHORT_DESCRIPTION,
               BOOK.DATE_PUBLISH,
               PostgresDSL.arrayAgg(concat(AUTHOR.FIRST_NAME, val(" "), AUTHOR.SECOND_NAME))
                   .as("authors"))
           .from(AUTHOR)
           .join(AUTHOR_BOOK)
           .on(AUTHOR_BOOK.ID_AUTHOR.equal(AUTHOR.ID_AUTHOR))
           .join(BOOK)
           .on(BOOK.ID_BOOK.equal(AUTHOR_BOOK.ID_BOOK))
           .where(BOOK.STATUS.equal(true))
           .groupBy(BOOK.ID_BOOK)
           .fetchInto(BookModel.class);
   logger.debug("Books: " + books);
   return books;
 }