📌 [MarketBridge] 08. 개발일지 - RestDoct 작성 중 오류 [com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class...]

📖 RestDocs 작성 중 serializer 에러 발생!

패키지, 소스코드 리팩토링 후 restdocs를 리팩토링 하려는데 다음과 같은 오류가 났다.

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.objects.marketbridge.order.controller.dto.ConfirmCancelReturnHttp$Request and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)

	at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
	at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1308)
	at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:414)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:53)
	at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:30)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:479)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:318)
	at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4719)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3964)
	at com.objects.marketbridge.order.controller.docs.OrderCancelReturnControllerRestDocsTest.confirmCancelReturn(OrderCancelReturnControllerRestDocsTest.java:126)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

에러에 겁이 낫지만 찾아보니 별거 아니었다. 기본생성자가 없기 때문이었다.

✏️ 문제 해결

	@Getter
    @NoArgsConstructor
    public static class Request {

        @NotNull
        private String orderNo;
        @NotNull
        private String cancelReason;

        @Builder
        public Request(String orderNo, String cancelReason) {
            this.orderNo = orderNo;
            this.cancelReason = cancelReason;
        }

        public ConfirmCancelReturnDto.Request toServiceRequest() {
            return ConfirmCancelReturnDto.Request.builder()
                    .orderNo(orderNo)
                    .cancelReason(cancelReason)
                    .build();
        }
    }

기존에 없었던 @NoArgsConstructor를 추가하여 기본 생성자를 만들어 주었다!