如何在Spring Data Rest应用程序中创建实体间的引用

Question

<!-- language-all: java -->    
@Entity
public class Category {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String name;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "category")
    private Set<Book> books;

    ...getters & setters next...
}

@Entity
public class Book {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String name;
    @ManyToOne
    private Category category;

    ...getters & setters next...
}

@RepositoryRestResource
public interface BookRepository extends JpaRepository<Book, Long> {}

@RepositoryRestResource
public interface CategoryRepository extends JpaRepository<Category, Long> {}

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

应用程序开始成功，我可以创建书籍和类别。
问题：如何创建和删除它们之间的引用？

我尝试了这里描述的解决方案：在Spring Data REST中发布@onetomany子资源关联--对我不起作用：在带有“contenttype：text/uri-list”头的PUT请求上，我有响应代码204，数据库中没有任何变化。深入观察，我在日志中发现了以下调试消息：

s.w.s.m.m.a.RequestMappingHandlerMapping : 
Did not find handler method for [/categories/1/books]

此url仅用于GET请求。

Answer 1

创建book(ID:1)和category(ID:1)之间的关系：

• 放入请求，
• 媒体类型:text/uri-list,
• 数据:http://localhost:8080/categories/1
• 对http://localhost:8080/books/1/category
的请求

卷曲示例：

curl -X PUT -H "Content-Type: text/uri-list" -d "http://localhost:8080/categories/1" http://localhost:8080/books/1/category

curl -X DELETE http://localhost:8080/books/1/category