유저 스킬, 포지션 빈값 response 할시 500 오류 해결

유저 회원가입 후에는 스킬, 포지션 빈값으로 받게되는데 본인의 스킬,포지션 수정을 안하고 본인 정보를 조회시 response에 500 오류가 나는 현상이 있어 수정했습니다

Author: NamDoHyeon2

src/main/java/hs/kr/backend/devpals/domain/user/convert/LongListConverter.java

@@ -1,32 +1,40 @@
 package hs.kr.backend.devpals.domain.user.convert;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import jakarta.persistence.AttributeConverter;
 import jakarta.persistence.Converter;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+import java.util.ArrayList;
 import java.util.List;
 
 @Converter
 public class LongListConverter implements AttributeConverter<List<Long>, String> {
 
-    private static final ObjectMapper objectMapper = new ObjectMapper();
+    private final ObjectMapper objectMapper = new ObjectMapper();
 
     @Override
     public String convertToDatabaseColumn(List<Long> attribute) {
+        if (attribute == null || attribute.isEmpty()) {
+            return "[]";
+        }
         try {
             return objectMapper.writeValueAsString(attribute);
-        } catch (Exception e) {
+        } catch (JsonProcessingException e) {
             throw new RuntimeException("JSON 변환 오류", e);
         }
     }
 
     @Override
     public List<Long> convertToEntityAttribute(String dbData) {
+        if (dbData == null || dbData.trim().isEmpty()) {
+            return new ArrayList<>(); // 빈 값일 경우 빈 리스트 반환
+        }
         try {
-            return objectMapper.readValue(dbData, new TypeReference<List<Long>>() {});
-        } catch (Exception e) {
+            return objectMapper.readValue(dbData, new TypeReference<>() {});
+        } catch (JsonProcessingException e) {
             throw new RuntimeException("JSON 변환 오류", e);
         }
     }
-}
+}

src/main/java/hs/kr/backend/devpals/domain/user/dto/UserResponse.java

@@ -8,6 +8,7 @@
 
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Collectors;
 
 @Getter
@@ -27,8 +28,8 @@ public class UserResponse {
     private LocalDateTime createdAt;
 
     public static UserResponse fromEntity(UserEntity user, UserFacade userFacade) {
-        List<Long> positionIds = user.getPositionIds();
-        List<Long> skillIds = user.getSkillIds();
+        List<Long> positionIds = Optional.ofNullable(user.getPositionIds()).orElse(List.of());
+        List<Long> skillIds = Optional.ofNullable(user.getSkillIds()).orElse(List.of());
 
         List<PositionTagResponse> positionResponses = userFacade.getPositionTagByIds(positionIds).stream()
                 .map(PositionTagResponse::fromEntity)

src/main/java/hs/kr/backend/devpals/domain/user/entity/UserEntity.java

@@ -56,11 +56,11 @@ public class UserEntity {
 
     @Convert(converter = LongListConverter.class)
     @Column(columnDefinition = "TEXT")
-    private List<Long> positionIds;
+    private List<Long> positionIds = new ArrayList<>();
 
     @Convert(converter = LongListConverter.class)
     @Column(columnDefinition = "TEXT")
-    private List<Long> skillIds;
+    private List<Long> skillIds = new ArrayList<>();
 
     /*
     @OneToMany(mappedBy = "user")