@RequestBody 不限于 POJO 类型并且 BindingResult hasErrors 始终为 false [英] @RequestBody not restricting to POJO type and BindingResult hasErrors always false

问题描述

我在开发的早期没有遇到这个问题，只是在调试另一个问题时注意到发生了这种情况.这发生在所有 REST 端点上，但下面是一个示例:

I was not experiencing this problem early in development but just noticed that this was happening when debugging another problem. This happens on all REST endpoints, but below is an example:

@RestController
@RequestMapping("/editlisting")
public class EditParkingSpaceListingController {
@Autowired
ParkingSpaceRepository parkingSpaceRepository;
@Autowired
ParkingSpaceListingRepository parkingSpaceListingRepository;

@RequestMapping(method = RequestMethod.PUT)
public ResponseEntity<String> editParking(@RequestBody ParkingSpaceListingClient pslc, BindingResult result) {
    if (result.hasErrors()) {
        return new ResponseEntity<String>("", HttpStatus.BAD_REQUEST);
    }
// Code to save pslc data to database.

现在，如果我发送一个带有正文的 HTTP 请求

Now, if I send an HTTP request with the body as

{  }

我收到 200 响应，当我检查 MongoDB 时，集合中有一个新的空文档.如果我发送一个没有括号的空正文，它会按预期返回 400.如果我发送一个包含 POJO 中不存在的随机垃圾数据的正文，BindingResult 似乎没有发现错误并且一个新的空白文档仍然存在创建.

I get a 200 response and when I check MongoDB, there is a new empty document in the collection. If I send an empty body with no brackets, as expected it will return 400. If I send a body with random garbage data that does not exist in the POJO, BindingResult does not seem to pick up the error and a new blank document is still created.

推荐答案

您需要按照以下步骤进行输入文档验证:

You need to follow the below steps for the input document validations:

(1) 将 javax.validation 包约束(如 @NotNull、@Size 等)添加到您的 ParkingSpaceListingClient bean 类.

(1) Add the javax.validation package constraints (like @NotNull, @Size, etc..) to your ParkingSpaceListingClient bean class.

(2) 将@Validated annotation 添加到您的控制器方法中，将验证错误捕获到BindingResult 对象中.

(2) Add @Validated annotation to your controller method, to capture the validation errors into BindingResult object.

您可以查看这里 有关输入验证的更多详细信息.

You can look here for more details on Input Validations.

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