JSON Serialization Error

새로운 Dto를 만들고 swagger로 api 테스트를 하는데 json serialization error가 발생했다.

2021-11-08 21:43:27.614 ERROR 11008 --- [nio-8080-exec-7] o.i.a.a.handler.GlobalExceptionHandler   : UnknownException : Type definition error: [simple type, class org.imgoing.api.dto.plan.PlanBookmarkDto]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.imgoing.api.dto.plan.PlanBookmarkDto and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: org.imgoing.api.support.ImgoingResponse["data"])

 

작성했던 Dto

package org.imgoing.api.dto.plan;

import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;

@NoArgsConstructor
@AllArgsConstructor
public class PlanBookmarkDto {
    private Long id;
    private Boolean isImportant;
}

 

해결방법 - Getter 추가 (lombok annotation으로 추가함)

package org.imgoing.api.dto.plan;

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;

@Getter
@NoArgsConstructor
@AllArgsConstructor
public class PlanBookmarkDto {
    private Long id;
    private Boolean isImportant;
}

 

참고 자료

https://stackoverflow.com/questions/8367312/serializing-with-jackson-json-getting-no-serializer-found

Serializing with Jackson (JSON) - getting "No serializer found"?

https://dumdildor.tistory.com/13

[Jackson] JSON Serialization Error

https://bactoria.github.io/2019/08/16/ObjectMapper%EB%8A%94-Property%EB%A5%BC-%EC%96%B4%EB%96%BB%EA%B2%8C-%EC%B0%BE%EC%9D%84%EA%B9%8C/

ObjectMapper는 Property를 어떻게 찾을까 ?

https://jojoldu.tistory.com/407

@Request Body에서는 Setter가 필요없다?