Сдал

src/main/java/ru/ip/labworks/labworks/bookshop/service/AuthorService.java

@@ -4,14 +4,16 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
 import ru.ip.labworks.labworks.bookshop.model.*;
+import org.hibernate.query.Query;
 
 import javax.persistence.EntityManager;
 import javax.persistence.EntityNotFoundException;
 import javax.persistence.PersistenceContext;
+import javax.persistence.Tuple;
 import java.io.File;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.stream.Collectors;
 
 @Service
 public class AuthorService {
@@ -87,12 +89,17 @@ public class AuthorService {
     }
 
     @Transactional
-    public Map<Author, List<Book>> AllAuthorsAndBooks(){
+    public Map<String, List<String>> AllAuthorsAndBooks(){
-        Map<Author, List<Book>> result = new HashMap<>();
+        List<Object[]> temp = entityManager.createQuery("select a.lastname as author, b.name as book " +
-        List<Author> tempList = findAllAuthors();
+                "from Author a " +
-        for (Author author : tempList){
+                "join a.books b " +
-            result.put(author, author.getBooks());
+                "group by a.id").getResultList();
-        }
+        return temp.stream()
-        return result;
+                .collect(
+                Collectors.groupingBy(
+                        o -> (String) o[0],
+                        Collectors.mapping( o -> (String) o[1], Collectors.toList() )
+                )
+        );
     }
 }

src/test/java/ru/ip/labworks/labworks/JpaAuthorTests.java

@@ -8,13 +8,12 @@ import ru.ip.labworks.labworks.bookshop.model.Author;
 import ru.ip.labworks.labworks.bookshop.model.Book;
 import ru.ip.labworks.labworks.bookshop.service.AuthorService;
 import ru.ip.labworks.labworks.bookshop.service.BookService;
-
-import javax.imageio.ImageIO;
 import javax.persistence.EntityNotFoundException;
-import java.awt.image.BufferedImage;
-import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 @SpringBootTest
 public class JpaAuthorTests {
@@ -107,6 +106,11 @@ public class JpaAuthorTests {
         Author author = authorService.addAuthor("Test", "Test", new File("D:\\Учёба\\Интернет программирование\\PIbd-22_Bondarenko_M.S._IP\\src\\main\\resources\\SK.jpg"));
         final Book book = bookService.addBook("Test2", "03.04.2023", new File("D:\\Учёба\\Интернет программирование\\PIbd-22_Bondarenko_M.S._IP\\src\\main\\resources\\glow.png"));
         authorService.addBookToAuthor(author.getId(), book);
+        Map<String, List<String>> result = new HashMap<>();
+        List<String> temp = new ArrayList<>();
+        temp.add(book.getName());
+        result.put(author.getLastName(), temp);
+        Assertions.assertEquals(authorService.AllAuthorsAndBooks(), result);
         Assertions.assertNotNull(authorService.AllAuthorsAndBooks());
     }
 }

src/test/java/ru/ip/labworks/labworks/JpaBookTests.java

@@ -89,7 +89,7 @@ public class JpaBookTests {
     }
 
     @Test
-    void TestRemoveBookFromAuthor(){
+    void TestRemoveGenreFromBook(){
         bookService.deleteAllBooks();
         genreService.deleteAllGenres();
         Book book = bookService.addBook("Test", "03.04.2023", new File("D:\\Учёба\\Интернет программирование\\PIbd-22_Bondarenko_M.S._IP\\src\\main\\resources\\glow.png"));

src/test/java/ru/ip/labworks/labworks/JpaGenreTests.java

@@ -4,7 +4,6 @@ import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
-import ru.ip.labworks.labworks.bookshop.model.Book;
 import ru.ip.labworks.labworks.bookshop.model.Genre;
 import ru.ip.labworks.labworks.bookshop.service.GenreService;