Java Spring 5 Get 和 findById mongo MonoOnErrorResume

Question

这里是 Spring 新手，尝试通过 findById(id, Object) 在 mongo 数据库中进行 GET http 查询。

但似乎不起作用。我可以POST和PUT，但是当通过ID调用查询时，我得到这个错误MonoOnErrorResume

• 我正在使用 EmbeddedMongoDB

Controller

public class ContentController {
    public static final String CONTENT_V_1_CONT = "/contents/v1/cont/";

    private final ContentService contentService;

    @Autowired
    public ContentController(ContentService contentService) {
        this.contentService = contentService;
    }

    @GetMapping(path = "{id}", produces = 
    MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Mono<Content> getContent(@PathVariable String id) {
       System.out.println(contentService.getContent(id)); // 
       MonoOnErrorResume
     return contentService.getContent(id);
    }

    @PostMapping(path = "", produces = 
    MediaType.APPLICATION_JSON_UTF8_VALUE, consumes = 
    MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Mono<Content> createContent(@RequestBody Mono<Content> content){
       return  contentService.createContent(content);
     }

服务实现

public final ReactiveMongoOperations reactiveMongoOperations;

@Autowired
public ContentServiceImplementation(ReactiveMongoOperations reactiveMongoOperations) {
   this.reactiveMongoOperations = reactiveMongoOperations;
}

@Override
public Mono<Content> getContent(String id) {
   return reactiveMongoOperations.findById(id, Content.class);
}

@Override
public Mono<Content> createContent(Mono<Content> contentMono) {
   return reactiveMongoOperations.save(contentMono);
}

数据配置不知道有用吗

@Bean
public ReactiveMongoDatabaseFactory mongoDatabaseFactory(MongoClient mongoClient){
   return new SimpleReactiveMongoDatabaseFactory(mongoClient, DATABASE_NAME);
}

@Bean
public ReactiveMongoOperations reactiveMongoTemplate(ReactiveMongoDatabaseFactory mongoDatabaseFactory){
   return new ReactiveMongoTemplate(mongoDatabaseFactory);
}

请注意我是否遗漏了一些关键信息

Answer 1

你的问题可能来自你的 Controller ，你像这样声明你的路径:

@GetMapping(path = "{id}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)

因此，除非您的 Controller 类映射末尾有一个 / ，否则您将会遇到问题，因为您的最终 URL 将如下所示:

http://localhost:8080/my/route/get1

而不是:

http://localhost:8080/my/route/get/1

你的@PathVariable看起来也很奇怪，尝试这样做:

@PathVariable("id") String id

确保 Spring 将 {id} 映射到您的 @PathVariable