Spring data mongoDb控制器如何将文档作为辅助文档中的字段进行更新

@RestController
@RequestMapping("/documents")
public class DocumentController {

    @Autowired
    private DocumentRepository documentRepository;

    @PatchMapping("/{id}")
    public ResponseEntity<?> updateDocument(@PathVariable("id") String id, @RequestBody Map<String, Object> updates) {
        Document document = documentRepository.findById(id).orElse(null);
        if (document == null) {
            return ResponseEntity.notFound().build();
        }

        // 将更新字段值设置到辅助文档字段中
        document.setAuxiliaryDocument(updates);

        // 保存更新后的主文档到MongoDB数据库
        documentRepository.save(document);

        return ResponseEntity.ok().build();
    }
}