Spring Data Rest 将自定义端点添加到特定存储库

问题描述

我想将自定义搜索端点添加到我现有的用户存储库.

I would like to add a custom search endpoint to my existing user repository.

我的用户存储库如下所示:

My user Repository looks like this:

@RepositoryRestResource(collectionResourceRel="users", path="users")
public interface UserRepository extends PagingAndSortingRepository<User, Long>{

    User findByUsername(String username);
}

自定义控制器:

@BasePathAwareController 
@RequestMapping("users/search")
public class CustomController implements ResourceProcessor<RepositorySearchesResource>, ResourceAssembler<User, Resource<User>> {
    @Autowired
    UserRepository userReposiotry;
    @Autowired
    private EntityLinks entityLinks;

    @RequestMapping(value = "findFirst", produces = "application/json")
    @ResponseBody
    public ResponseEntity<Resource<User>> findFirstUser() {
          Resource<User> resource = toResource(userReposiotry.findOne(1L));
          return new ResponseEntity<Resource<User>>(resource, HttpStatus.OK);
    }

    @Override
    public RepositorySearchesResource process(RepositorySearchesResource resource) {
        LinkBuilder lb = entityLinks.linkFor(User.class, "username");
        resource.add(new Link(lb.toString() + "/search/findFirst", "findFirst"));
        return resource;
    }

    @Override
    public Resource<User> toResource(User user) {
        Resource<User> resource = new Resource<User>(user);
        return resource;
    }
}

这将为用户返回正确的搜索端点:

This returns the correct search endpoint for the users:

{
  "_links": {
    "findByUsername": {
      "href": "http://localhost:8080/api/users/search/findByUsername"
    },
    "self": {
      "href": "http://localhost:8080/api/users/search"
    },
    "findFirst": {
      "href": "http://localhost:8080/api/users/search/findFirst",
      "templated": true
    }
  }
}

但也适用于邀请等其他端点:

But also for other endpoints like Invites:

{
  "_links": {
    "findUserByInvite": {
      "href": "http://localhost:8080/api/invites/search/findUserByInvite"
    },
    "self": {
      "href": "http://localhost:8080/api/invites/search"
    },
    "findFirst": {
      "href": "http://localhost:8080/api/invites/search/findFirst",
      "templated": true
    }
  }
}

这怎么能仅限于用户?谢谢

How can this be restricted to the users only? Thanks

推荐答案

我假设您的邀请端点也返回一个 RepositorySearchesResource ?！每当 spring-data-rest 序列化 RepositorySearchesResource 时，都会调用您的 ResourceProcessor.如果您想为用户和邀请提供不同的链接，您有一些选择:

I assume your invites endpoint also returns a RepositorySearchesResource ?! Your ResourceProcessor is invoked whenever spring-data-rest serializes a RepositorySearchesResource. If you want different links for users and invites you have some alternatives:

• 为您的搜索端点使用不同的返回类型，以便您可以有不同的 ResourceProcessor 实现
• 在您的 ResourceProcessor 中添加更多逻辑，以区分您是在邀请还是用户用例中

• use different return types for your search endpoints so you can have different ResourceProcessor implementations
• put more logic inside your ResourceProcessor to differentiate if you are in your invites or users use case

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