Just @manytoone

Author: AnghelLeonard

HibernateSpringBootJustManyToOne/src/main/java/com/bookstore/MainApplication.java

@@ -24,9 +24,9 @@ public static void main(String[] args) {
     @Bean
     public ApplicationRunner init() {
         return args -> {
-            System.out.println("\nAdd new book to an author ...");
+            System.out.println("\nInsert new book to an author ...");
             System.out.println("---------------------------------------------");
-            bookstoreService.addNewBook();
+            bookstoreService.insertNewBook();
             System.out.println("---------------------------------------------");
 
             System.out.println("\nList all books of an author ...");
@@ -46,7 +46,7 @@ public ApplicationRunner init() {
 
             System.out.println("\nFetch a list of books and delete the first book ...");
             System.out.println("---------------------------------------------");
-            bookstoreService.fetchBooksOfAuthorByIdDeleteFirstBook();
+            bookstoreService.fetchBooksOfAuthorByIdAndDeleteFirstBook();
             System.out.println("---------------------------------------------");
         };
     }

HibernateSpringBootJustManyToOne/src/main/java/com/bookstore/repository/AuthorRepository.java

@@ -3,11 +3,7 @@
 import com.bookstore.entity.Author;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
-import org.springframework.transaction.annotation.Transactional;
 
 @Repository
-public interface AuthorRepository extends JpaRepository<Author, Long> {
-    
-    @Transactional(readOnly=true)
-    Author findByName(String name);
+public interface AuthorRepository extends JpaRepository<Author, Long> {            
 }

HibernateSpringBootJustManyToOne/src/main/java/com/bookstore/repository/BookRepository.java

@@ -10,13 +10,12 @@
 import org.springframework.transaction.annotation.Transactional;
 
 @Repository
+@Transactional(readOnly = true)
 public interface BookRepository extends PagingAndSortingRepository<Book, Long> {
-   
-    @Transactional(readOnly = true)
+
     @Query("SELECT b FROM Book b WHERE b.author.id = :id")
     List<Book> fetchBooksOfAuthorById(Long id);
-    
-    @Transactional(readOnly = true)
+
     @Query("SELECT b FROM Book b WHERE b.author.id = :id")
     Page<Book> fetchPageBooksOfAuthorById(Long id, Pageable pageable);
 }

HibernateSpringBootJustManyToOne/src/main/java/com/bookstore/service/BookstoreService.java

@@ -25,7 +25,7 @@ public BookstoreService(AuthorRepository authorRepository,
     }
 
     @Transactional
-    public void addNewBook() {
+    public void insertNewBook() {
         Author author = authorRepository.getOne(4L);
         // or, less efficient since a SELECT is triggered
         // Author author = authorRepository.findByName("Joana Nimar");        
@@ -66,7 +66,7 @@ public void fetchBooksOfAuthorByIdAndAddNewBook() {
     }
 
     @Transactional
-    public void fetchBooksOfAuthorByIdDeleteFirstBook() {
+    public void fetchBooksOfAuthorByIdAndDeleteFirstBook() {
         List<Book> books = bookRepository.fetchBooksOfAuthorById(4L);
 
         bookRepository.delete(books.remove(0));                

HibernateSpringBootJustManyToOne/src/main/resources/data-mysql.sql

@@ -1,8 +1,11 @@
-insert into author (age, name, genre, id) values (23, "Mark Janel", "Anthology", 1);
-insert into author (age, name, genre, id) values (43, "Olivia Goy", "Horror", 2);
-insert into author (age, name, genre, id) values (51, "Quartis Young", "Anthology", 3);
-insert into author (age, name, genre, id) values (34, "Joana Nimar", "History", 4);
-insert into book (isbn, title, author_id, id) values ("001-JN", "A History of Ancient Prague", 4, 1);
-insert into book (isbn, title, author_id, id) values ("002-JN", "A People's History", 4, 2);
-insert into book (isbn, title, author_id, id) values ("001-MJ", "The Beatles Anthology", 1, 3);
-insert into book (isbn, title, author_id, id) values ("001-OG", "Carrie", 2, 4);
+-- insert authors
+INSERT INTO `author` (`age`, `name`, `genre`, `id`) VALUES (23, "Mark Janel", "Anthology", 1);
+INSERT INTO `author` (`age`, `name`, `genre`, `id`) VALUES (43, "Olivia Goy", "Horror", 2);
+INSERT INTO `author` (`age`, `name`, `genre`, `id`) VALUES (51, "Quartis Young", "Anthology", 3);
+INSERT INTO `author` (`age`, `name`, `genre`, `id`) VALUES (34, "Joana Nimar", "History", 4);
+
+-- insert books
+INSERT INTO `book` (`isbn`, `title`, `author_id`, `id`) VALUES ("001-JN", "A History of Ancient Prague", 4, 1);
+INSERT INTO `book` (`isbn`, `title`, `author_id`, `id`) VALUES ("002-JN", "A People's History", 4, 2);
+INSERT INTO `book` (`isbn`, `title`, `author_id`, `id`) VALUES ("001-MJ", "The Beatles Anthology", 1, 3);
+INSERT INTO `book` (`isbn`, `title`, `author_id`, `id`) VALUES ("001-OG", "Carrie", 2, 4);