如何验证列表<object>这样所有数据成员都存在于使用 javax.validation 的请求中？<div id="text_translate"><p> 我正在学习 Spring 引导 bean 验证，并希望在父实体中存在的 List 中实现自定义验证，以便发送更精确的错误作为响应。 请提出解决方案。在此先感谢。<br></p><p> 我有一个申请人 Pojo class 如下</p><pre>@Builder @Data @NoArgsConstructor @AllArgsConstructor public class Applicant{ @NotEmpty (message="name is mandatory") private String name; @NotEmpty (message="addresses is mandatory") @Valid private List&lt;Address&gt; addresses; }</pre><p> 地址 Class 如下。</p><pre> @Builder @Data @NoArgsConstructor @AllArgsConstructor public class Address{ @NotEmpty (message="Line1 is mandatory") private String line1; @NotEmpty (message="Line2 is mandatory") private String line2; @NotEmpty (message="pinCode is mandatory") private String pinCode; }</pre><p> class 申请人的示例请求正文如下</p><pre>{ "name":"hello", "addresses":[{ "line1":"Line1", "pinCode":"pinCode" }, { "line2":"Line2", "pinCode":"pinCode" }] }</pre><p> Output 使用默认验证如下。</p><pre> { "timestamp": "2020-08-15T09:29:30.807+0000", "status": 400, "errors": [ "Line2 is mandatory", "Line1 is mandatory" ] }</pre><p> 我想实现自定义验证，例如 output 将如下所示。</p><pre> { "timestamp": "2020-08-15T09:29:30.807+0000", "status": 400, "errors": [ "Line2 is mandatory in record 1 of addresses", "Line1 is mandatory in record 1 of addresses" ] }</pre><p> “Line2 is required in record 1 of addresses”表示地址 Json 数组中的记录 1 是强制性的，并且请求正文中不存在标记。</p></div></object>

Question

I'm learning the Spring Boot bean validation and wanted to implement custom validation in List present in the parent entity in such as way that more precise error is sent in response. Please suggest solution.Thanks in advance.

I have a Applicant Pojo class as follows

@Builder
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Applicant{
    @NotEmpty (message="name is mandatory")
    private String name;
    @NotEmpty (message="addresses is mandatory")
    @Valid
    private List<Address> addresses;
}

Address Class is as follows.

@Builder
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Address{
    @NotEmpty  (message="Line1 is mandatory")
    private String line1;
    @NotEmpty (message="Line2 is mandatory") 
    private String line2;
    @NotEmpty (message="pinCode is mandatory")
    private String pinCode;
}

Sample Request body for the class Applicant is as follows

{
  "name":"hello",
  "addresses":[{
    "line1":"Line1",
    "pinCode":"pinCode"
  },
  {
    "line2":"Line2",
    "pinCode":"pinCode"
  }]
}

Output using default validation is as follows.

{
    "timestamp": "2020-08-15T09:29:30.807+0000",
    "status": 400,
    "errors": [
        "Line2 is mandatory",
        "Line1 is mandatory"
    ]
}

I want to implement custom validation is such as way that the output will be as follows.

{
    "timestamp": "2020-08-15T09:29:30.807+0000",
    "status": 400,
    "errors": [
        "Line2 is mandatory in record 1 of addresses",
        "Line1 is mandatory in record 1 of addresses"
    ]
}

"Line2 is mandatory in record 1 of addresses" will indicate that the record 1 in Address Json Array is mandatory and the tag is not present in the request body.

Answer 1

I have added the code in the repository - https://github.com/greenlearner01/rest-api-validation/tree/master/userManagementApp

Now the error message will look like below(it's not exactly same as you asked for but I think very close)-

 {
   "status": "BAD_REQUEST",
   "errors": [
     "addresses[2].line1:must not be null",
     "addresses[2].line2:must not be null",
     "addresses[0].line1:must not be null",
     "addresses[1].line2:must not be null"
   ],
   "timestamp": "2020-08-15T17:52:31.138",
   "path": "uri=/user"
 }

Here Important thing is to add the @ControllerAdvice where the ConstraintViolationException is taken care of.