相关疑难解决方法(0)

我正在尝试使用spring-boot-starter-data-rest使用Spring Boot构建RESTful API.有一些实体:帐户,交易,类别和用户 - 只是通常的东西.

当我通过默认生成的API 检索http:// localhost:8080/transactions中的对象时,一切顺利,我得到一个包含所有事务的列表作为JSON对象,如下所示:

{
  "amount": -4.81,
  "date": "2014-06-17T21:18:00.000+0000",
  "description": "Pizza",
  "_links": {
    "self": {
      "href": "http://localhost:8080/transactions/5"
    },
    "category": {
      "href": "http://localhost:8080/transactions/5/category"
    },
    "account": {
      "href": "http://localhost:8080/transactions/5/account"
    }
  }
}

但现在的目标是仅检索该URL下的最新事务,因为我不想序列化整个数据库表.所以我写了一个控制器:

@Controller
public class TransactionController {
    private final TransactionRepository transactionRepository;

    @Autowired
    public TransactionController(TransactionRepository transactionRepository) {
        this.transactionRepository = transactionRepository;
    }

    // return the 5 latest transactions
    @RequestMapping(value = "/transactions", method = RequestMethod.GET)
    public @ResponseBody List<Transaction> getLastTransactions() {
        return  transactionRepository.findAll(new PageRequest(0, 5, new Sort(new Sort.Order(Sort.Direction.DESC, "date")))).getContent(); …