인프런 커뮤니티 질문&답변

아래와 같이 프로젝트에 적용 중입니다. Controller, Serializer 둘 다 sprigframework.validation의 Errors를 임포트하고 있습니다. 어떻게 해결해야할까요?

 

ErrorsSerializer

package com.kakaogame.queen.boysinthesharehouse.global.common;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import org.springframework.boot.jackson.JsonComponent;
import org.springframework.validation.Errors;

import java.io.IOException;

@JsonComponent
public class ErrorsSerializer extends JsonSerializer<Errors> {
    @Override
    public void serialize(Errors errors, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
        jsonGenerator.writeStartArray();

        errors.getFieldErrors().forEach(e -> {
            try {
                jsonGenerator.writeStartObject();
                jsonGenerator.writeStringField("field", e.getField());
                jsonGenerator.writeStringField("objectName", e.getObjectName());
                jsonGenerator.writeStringField("code", e.getCode());
                jsonGenerator.writeStringField("defaultMessage", e.getDefaultMessage());
                Object rejectedValue = e.getRejectedValue();
                if (rejectedValue != null) {
                    jsonGenerator.writeStringField("rejectedValue", rejectedValue.toString());
                }
                jsonGenerator.writeEndObject();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        });

        errors.getGlobalErrors().forEach(e -> {
            try {
                jsonGenerator.writeStartObject();
                jsonGenerator.writeStringField("objectName", e.getObjectName());
                jsonGenerator.writeStringField("code", e.getCode());
                jsonGenerator.writeStringField("defaultMessage", e.getDefaultMessage());
                jsonGenerator.writeEndObject();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        });

        jsonGenerator.writeEndArray();
    }
}

 

PlayerController

@PutMapping("/{platformId}")
public ResponseEntity updatePlayer(@PathVariable Long platformId,
                                   @RequestBody @Valid PlayerDto.UpdateRequest reqDto,
                                   Errors errors) {

    var optionalAccount = accountSearchService.getAccount(platformId);
    if (optionalAccount.isEmpty())
        return ResponseEntity.notFound().build();

    if (errors.hasErrors())
        return ResponseEntity.badRequest().body(errors);

    var isSuccess = playerUpdateService.updatePlayer(optionalAccount.get(), reqDto);
    var playerDto = new PlayerDto.UpdateResponse(isSuccess);
    return ResponseEntity.ok(playerDto);
}

 

Error 메시지

org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.springframework.validation.DefaultMessageCodesResolver]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.validation.DefaultMessageCodesResolver and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: org.springframework.validation.BeanPropertyBindingResult["messageCodesResolver"])

 

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ObjectMapper 를 AutoWired 해서 다음과 같이하면 실행되긴하네요 ㅠ

return ResponseEntity.badRequest().body(objectMapper.writeValueAsString(errors));