[FIXED] can we validate incomplete DTO property?

Issue

I am new to spring-boot I'm trying to create validation custom like below.

@ControllerAdvice
@RestController
public class SpecificResponse extends ResponseEntityExceptionHandler {
    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
            HttpHeaders headers,
            HttpStatus status, WebRequest request) {
            logger.info("1");
            List<String> errors = new ArrayList<String>();
            // String coba = requestContext.getInfo();
            for (FieldError error : ex.getBindingResult().getFieldErrors()) {
            errors.add(error.getField() + ": " + error.getDefaultMessage());
            }
            for (ObjectError error : ex.getBindingResult().getGlobalErrors()) {
            errors.add(error.getObjectName() + ": " + error.getDefaultMessage());
            }
            ApiError apiError = new ApiError();
            apiError.setResponseCode("99");
            apiError.setResponseDesc(ex.getBindingResult().getFieldValue("field") + " Failed");
            apiError.setResponseError(errors.toString());
            return handleExceptionInternal(
                    ex, apiError, headers,HttpStatus.BAD_REQUEST, request);
        
        }
}

Below is my DTO class

import javax.validation.constraints.Email;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import org.hibernate.annotations.NotFound;
import lombok.Data;
@Data
public class LiteTimeCreateDTO {
    @NotNull
    @NotEmpty(message = "Customer Code is required")
    @NotFound
    @NotBlank
    private String customerCode;
     
    @NotNull
    @NotEmpty(message = "Customer Code2 is required")
    @NotFound
    @NotBlank
    private String customerCode2;
    
    @Email
    private String customerCode3;
}

Below is my object sent by postman

{
    // "customerCode": "as",
    "customerCode3": "[email protected]",
    "customerCode2" : "ds"
}

Below is my endpoint in controller

@GetMapping("")
public ResponseEntity<ApiSuccess> getData( @Valid @RequestBody(required = true) LiteTimeCreateDTO liteTimeCreateDTO,  @RequestHeader(value = "User-Access") String header,  BindingResult result){
      ApiSuccess dataError = new ApiSuccess();
      dataError.setResponseCode("00");
      dataError.setResponseDesc("Get Lite Time Success");
//    dataError.setResponseData(datas);
      return new ResponseEntity<ApiSuccess>(dataError, HttpStatus.CREATED);
}

Everything is fine, it's just that I'm curious how to validate the sent dto is incomplete? when I send only 2 data there is no result response in my postman. How to fix and get the error response since there is no response in my postman.

Solution

Do not use comments in JSON. Use the following request body instead:

{
    "customerCode3": "[email protected]",
    "customerCode2": "ds"
}

Answered By - João Dias