2024-03-28T17:57:48.001+09:00 ERROR 38812 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[.[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [/api] threw exception [Request processing failed: org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class com.ssafy.newstar.domain.article.dto.ArticleDetailResponse]] with root cause
com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.ssafy.newstar.domain.article.dto.ArticleDetailResponse and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.ssafy.newstar.util.response.SuccessResponseEntity["data"])
@Data를 붙이지 않으니 Json 으로 변환해서 데이터 랜더링을 못했던 오류이다 !
JSON 직렬화 변환 과정에서는 Jackson 라이브러를 사용하기 때문에
Json -> 객체 = Setter 사용,
객체 -> Json = Getter 사용
따라서 해당 메소드가 존재하지 않는다면 에러가 나는 것이다 !
참조 : https://mommoo.tistory.com/83
package com.ssafy.newstar.domain.record.dto;
import com.ssafy.newstar.domain.article.entity.Article;
import java.util.List;
import lombok.Data;
import lombok.ToString;
public class RecordResponse {
Long id;
private String title;
private Integer scategory;
public static RecordResponse createRecordResponse(Article article) {
RecordResponse recordResponse = new RecordResponse();
recordResponse.id = article.getId();
recordResponse.title = article.getTitle();
recordResponse.scategory = article.getScategory();
return recordResponse;
}
public static List<RecordResponse> createRecordResponse(List<Article> articles) {
return articles.stream().map(RecordResponse::createRecordResponse).toList();
}
}
@Data
public class RecordResponse
해당 설정으로 에러를 해결할 수 있었다.
