使用spring data rest在2个实体之间一对一地创建关系/链接

Question

“必须只发送1个链接才能更新不是列表或地图的属性引用”

细节：

// 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：

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

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

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

问候，布莱德。

Answer 1

它实际上是Spring Boot 2.2.0org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController类第321行中的一个bug：

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.");
}

下面是String Boot 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.");
}