为嵌套关系配置多段 @RepositoryRestResource 路径

Posted 2023-02-26

【中文标题】为嵌套关系配置多段 @RepositoryRestResource 路径

【英文标题】：Configuring @RepositoryRestResource path with multi-segment for nested relationships

【发布时间】：2021-05-14 16:43:04

【问题描述】：

我为拥有多个地址的客户创建了 2 个 HATEOS @RepositoryRestResource：

class Customer 
  ...
  Long id;
  @OneToMany(
  Set<Address> addresses;
  ...


class Address 
  ...
  Long id;
  ...


@RepositoryRestResource(path = "customers")
public interface CustomerRepository extends PagingAndSortingRepository<Customer, Long> 


@RepositoryRestResource(path = "addresses")
public interface AddressRepository extends PagingAndSortingRepository<Address, Long> 

我可以通过以下多段路径获取地址实体

Get Address 1 of Customer 1: GET /customers/1/adresses/1

但是...我无法使用相同的多段路径修补、放置或删除地址

Update Address 1 of Customer 1: PATCH, PUT or DELETE /customers/1/adresses/1

我总是收到 404 - Not Found。仅当我使用地址端点时才有效

Update Address 1 : PATCH, PUT or DELETE /adresses/1

有没有办法配置 @RepositoryRestResource 以便我可以更新/删除地址（或通过客户端点 (/customers/customerId/addresses/addressId) 与客户相关的任何实体）？

问候

代码可在https://github.com/fdlessard/spring-boot-repository-rest-resource获取

【参考方案1】：

当你 GET /customers/1/addresses/1 时，响应 JSON 应该是

  "country": "XYZ",
  "_links": 
    "self": 
      "href": "http://localhost:8888/addresses/1" <-- here
    ,
    "address": 
      "href": "http://localhost:8888/addresses/1"
    
  

使用链接self，即http://localhost:8888/addresses/1进行更新。

实际上，当您 GET /customers/1/addresses 时，响应 JSON 的数组 addresses 已经为您提供了真正的 URI /addresses/1。

  "_embedded": 
    "addresses": [
      
        "country": "XYZ",
        "_links": 
          "self": 
            "href": "http://localhost:8888/addresses/1"  <-- here
          ,
          "address": 
            "href": "http://localhost:8888/addresses/1"
          
        
      
    ]
  ,
  "_links": 
    "self": 
      "href": "http://localhost:8888/customers/1/addresses"
    
  

请记住，在使用 HATEOAS 时，发现链接并遵循 href，而不是硬编码 URI。见https://docs.spring.io/spring-hateoas/docs/current/reference/html/#client.link-discoverer