Spring Data REST – 使用Java HATEOAS消费实体列表时出现未识别字段”_embedded”。

huangapple
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英文:

Spring Data REST - Unrecognized field "_embedded" by consuming list of entities, Java HATEOAS

问题

这是我从您提供的内容中提取并翻译的代码部分：

  1. @Setter
  2. @Getter
  3. @AllArgsConstructor
  4. public class Post {
  5.   private int id;
  6.   private int branch;
  7.   private String article;
  8.   private Date datePublished;
  9.   private String featuredImage;
  10.   private Boolean commentsEnabled;
  11.   private Boolean enabled;
  12.   private int views;
  13.   private String snippetTitle;
  14.   private String snippetDescription;
  15. }
  1. ObjectMapper mapper = new ObjectMapper();
  2. MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
  4. messageConverter.setSupportedMediaTypes(MediaType.parseMediaTypes("application/hal+json"));
  5. messageConverter.setObjectMapper(mapper);
  7. ResponseEntity<PagedModel<Post>> responseEntity =
  8.   new RestTemplate(Arrays.asList(messageConverter)).exchange(uri, HttpMethod.GET, HttpEntity.EMPTY, new ParameterizedTypeReference<PagedModel<Post>>() {});

版本信息：

Jackson-databind 版本：2.11.0

Spring-hateoas 版本：1.0.5.RELEASE

感谢您的帮助！

英文:

I am trying to consume a list of entities from the following REST HAL response:

  1.     {
  2.   &quot;_embedded&quot; : {
  3.     &quot;posts&quot; : [ {
  4.       &quot;branch&quot; : 1,
  5.       &quot;article&quot; : &quot;aaaaaaa&quot;,
  6.       &quot;featuredImage&quot; : &quot;aaaaaaa&quot;,
  7.       &quot;authorId&quot; : 1,
  8.       &quot;datePublished&quot; : &quot;2020-05-05T09:11:13.336+0000&quot;,
  9.       &quot;commentsEnabled&quot; : true,
  10.       &quot;enabled&quot; : false,
  11.       &quot;views&quot; : 0,
  12.       &quot;snippetTitle&quot; : null,
  13.       &quot;snippetDescription&quot; : null,
  14.       &quot;comments&quot; : null,
  15.       &quot;_links&quot; : {
  16.         &quot;self&quot; : {
  17.           &quot;href&quot; : &quot;http://localhost:8081/posts/1&quot;
  18.         },
  19.         &quot;post&quot; : {
  20.           &quot;href&quot; : &quot;http://localhost:8081/posts/1&quot;
  21.         },
  22.         &quot;categories&quot; : {
  23.           &quot;href&quot; : &quot;http://localhost:8081/posts/1/categories&quot;
  24.         }
  25.       }
  26.     }, {
  27.       &quot;branch&quot; : 1,
  28.       &quot;article&quot; : &quot;aaaaaaa&quot;,
  29.       &quot;featuredImage&quot; : &quot;aaaaaaa&quot;,
  30.       &quot;authorId&quot; : 1,
  31.       &quot;datePublished&quot; : &quot;2020-05-05T10:45:15.999+0000&quot;,
  32.       &quot;commentsEnabled&quot; : true,
  33.       &quot;enabled&quot; : false,
  34.       &quot;views&quot; : 0,
  35.       &quot;snippetTitle&quot; : null,
  36.       &quot;snippetDescription&quot; : null,
  37.       &quot;comments&quot; : null,
  38.       &quot;_links&quot; : {
  39.         &quot;self&quot; : {
  40.           &quot;href&quot; : &quot;http://localhost:8081/posts/3&quot;
  41.         },
  42.         &quot;post&quot; : {
  43.           &quot;href&quot; : &quot;http://localhost:8081/posts/3&quot;
  44.         },
  45.         &quot;categories&quot; : {
  46.           &quot;href&quot; : &quot;http://localhost:8081/posts/3/categories&quot;
  47.         }
  48.       }
  49.     } ]
  50.   },
  51.   &quot;_links&quot; : {
  52.     &quot;self&quot; : {
  53.       &quot;href&quot; : &quot;http://localhost:8081/posts/search/byAuthorId?authorId=1&amp;page=0&amp;size=10&quot;
  54.     }
  55.   },
  56.   &quot;page&quot; : {
  57.     &quot;size&quot; : 10,
  58.     &quot;totalElements&quot; : 3,
  59.     &quot;totalPages&quot; : 1,
  60.     &quot;number&quot; : 0
  61.   }
  62. }

I would like to map these entities to this class:

  1. @Setter
  2. @Getter
  3. @AllArgsConstructor
  4. public class Post {
  5.   private int id;
  6.   private int branch;
  7.   private String article;
  8.   private Date datePublished;
  9.   private String featuredImage;
  10.   private Boolean commentsEnabled;
  11.   private Boolean enabled;
  12.   private int views;
  13.   private String snippetTitle;
  14.   private String snippetDescription;
  15. }

However, I keep getting the error:

> Unrecognized field "_embedded" (class
> org.springframework.hateoas.PagedModel), not marked as ignorable (3
> known properties: "links", "page", "content"])

With this code:

  1.   ObjectMapper mapper = new ObjectMapper();
  2.   MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
  4.   messageConverter.setSupportedMediaTypes(MediaType.parseMediaTypes(&quot;application/hal+json&quot;));
  5.   messageConverter.setObjectMapper(mapper);
  7.   ResponseEntity&lt;PagedModel&lt;Post&gt;&gt; responseEntity =
  8.     new RestTemplate(Arrays.asList(messageConverter)).exchange(uri, HttpMethod.GET, HttpEntity.EMPTY, new ParameterizedTypeReference&lt;PagedModel&lt;Post&gt;&gt;() {});

The versions are:

Jackson-databind version: 2.11.0

Spring-hateoas version: 1.0.5.RELEASE

Any help would be appreciated!

答案1

得分: 0

回复结构看起来类似于 PagedResources<T> 类型。

在 ParameterizedTypeReference 中使用 org.springframework.hateoas.PagedResources

  1. ResponseEntity<PagedResources<Post>> responseEntity =
  2.     new RestTemplate(Arrays.asList(messageConverter)).exchange(uri, HttpMethod.GET, HttpEntity.EMPTY, new ParameterizedTypeReference<PagedResources<Post>>() {});
英文:

Response structure seems like PagedResources&lt;T&gt; type.

Use org.springframework.hateoas.PagedResources in ParameterizedTypeReference

  1. ResponseEntity&lt;PagedResources&lt;Post&gt;&gt; responseEntity =
  2.     new RestTemplate(Arrays.asList(messageConverter)).exchange(uri, HttpMethod.GET, HttpEntity.EMPTY, new ParameterizedTypeReference&lt;PagedResources&lt;Post&gt;&gt;() {});

huangapple
  • 本文由 发表于 2020年5月5日 18:58:50
  • 转载请务必保留本文链接：https://java.coder-hub.com/61611533.html
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