可分页的elasticsearch findAll

Question

我需要获取所有可分页的文档，但我遇到了这个错误

com.fasterxml.jackson.databind.JsonMappingException：（java.lang.NullPointerException）（通过引用链：org.springframework.data.elasticsearch.core.aggregation.impl.AggregatedPageImpl["facets"]）

存储库

public interface ConventionSearchRepository extends ElasticsearchRepository<Convention, Long> {
}

服务

@Service
@Transactional
public class ConventionServiceImpl implements ConventionService {

  private final ConventionSearchRepository conventionSearchRepository;

   @Override
   @Transactional(readOnly = true)
   public Page<Convention> findAll(final PageRequest pageable) {
     return conventionSearchRepository.findAll(pageable);
   }

}

控制器

  @GetMapping("/conventions")
  public Page<Convention> getAllConventions(@RequestParam(value = "_page", required = false, defaultValue = "0") int page,
      @RequestParam(value = "_perPage", required = false, defaultValue = "20") int perPage,
      @RequestParam(value = "_sortDir", required = false, defaultValue = "DESC") Sort.Direction sortDir,
      @RequestParam(value = "_sortBy", required = false, defaultValue = "shortname") String sortBy) {
    Sort sort = new Sort(sortDir, sortBy);
    PageRequest pageRequest = new PageRequest(page, perPage, sort);
    return conventionService.findAll(pageRequest);
  }

Answer 1

我可以简单地声明一个组织。springframework。数据领域将Pageable参数传递给我的@Controller，然后将其直接传递给我的服务，最终传递给@Repository（我使用CustomRepository对其进行了扩展）。Spring负责填充有关排序参数等的所有细节。我不必详细定义单独的@RequestParams。

这里有个例子

public Page<LogEntry> findAllLogEntries(@PageableDefault(page = DEFAULT_PAGE, size = DEFAULT_PAGE_SIZE) @SortDefault.SortDefaults({@SortDefault(sort = "@timestamp", direction = Direction.DESC)}) Pageable pageable) {

我在Spring 5和Spring Data Elasticsearch 3.0.5上。发布