使用弹簧数据支架在两个实体之间创建一对一的关系/链接

Question

遵循本教程https://www.baeldung.com/spring-data-rest-relationships我试图用一个rest-put调用在两个实体之间重现一次链接创建。

然而，当我尝试链接地址/1&library/1/libraryAddresscurl-i-X PUT-d"http://localhost:8080/addresses/1"-H"内容类型：text/uri列表"http://localhost:8080/libraries/1/libraryAddress

"必须只发送一个链接来更新不是列表或地图的属性引用">

详细信息：

// Data model
// Master library class which have one address
@Entity
public class Library {
@Id
@GeneratedValue
private long id;
@Column
private String name;
@OneToOne
@JoinColumn(name = "address_id")
@RestResource(path = "libraryAddress", rel="address")
private Address address;
// standard constructor, getters, setters
}
// Address linked with a onetoone relation with library
@Entity
public class Address {
@Id
@GeneratedValue
private long id;
@Column(nullable = false)
private String location;
@OneToOne(mappedBy = "address")
private Library library;
// standard constructor, getters, setters
}
// Repositories
public interface LibraryRepository extends CrudRepository<Library, Long> {}
public interface AddressRepository extends CrudRepository<Address, Long> {}

使用rest api进行的查询：

创建一个库

curl -i -X POST -H "Content-Type:application/json"
-d '{"name":"My Library"}' http://localhost:8080/libraries

创建地址

curl -i -X POST -H "Content-Type:application/json"
-d '{"location":"Main Street nr 5"}' http://localhost:8080/addresses

创建关联

curl -i -X PUT -d "http://localhost:8080/addresses/1"
-H "Content-Type:text/uri-list" http://localhost:8080/libraries/1/libraryAddress

-->错误｛"cause"：null，"message"："必须只发送1个链接才能更新不是List或Map的属性引用。"｝

你有解决这个问题的线索吗？

谨致问候，脸红了。

Answer 1

这实际上是Spring Boot 2.2.0org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController类中321行的一个错误：

if (source.getLinks().hasSingleLink()) {
throw new IllegalArgumentException(
"Must send only 1 link to update a property reference that isn't a List or a Map.");
}

应该是：

if (!source.getLinks().hasSingleLink()) {
throw new IllegalArgumentException(
"Must send only 1 link to update a property reference that isn't a List or a Map.");
}

这是字符串引导2.1.7 的代码

if (source.getLinks().size() != 1) {
throw new IllegalArgumentException(
"Must send only 1 link to update a property reference that isn't a List or a Map.");
}

Answer 2

此类订单符合2.1.10.BUILD-SNAPSHOT，但不符合2.2.0.RELEASE

在这个版本中，情况可能发生了变化。我会看看的。不过，谢谢你指出这一点。

有人已经成功地用2.2.0运行了这种休息调用？