[fix] 문항 세트 조회에 문항 내 새끼문항의 개념태그까지 추가해서 조회

Author: sejoon00

src/main/java/com/moplus/moplus_server/domain/problemset/dto/response/ProblemSummaryResponse.java

@@ -2,7 +2,7 @@
 
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
 import jakarta.validation.constraints.NotNull;
-import java.util.List;
+import java.util.Set;
 import lombok.Builder;
 
 @Builder
@@ -15,9 +15,9 @@ public record ProblemSummaryResponse(
         String memo,
         String mainProblemImageUrl,
         @NotNull(message = "컬렉션 값은 필수입니다.")
-        List<String> tagNames
+        Set<String> tagNames
 ) {
-    public static ProblemSummaryResponse of(Problem problem, List<String> tagNames) {
+    public static ProblemSummaryResponse of(Problem problem, Set<String> tagNames) {
 
         return ProblemSummaryResponse.builder()
                 .problemId(problem.getId())

src/main/java/com/moplus/moplus_server/domain/problemset/service/ProblemSetGetService.java

@@ -14,7 +14,9 @@
 import com.moplus.moplus_server.global.error.exception.ErrorCode;
 import java.time.LocalDate;
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -41,7 +43,7 @@ public ProblemSetGetResponse getProblemSet(Long problemSetId) {
         List<ProblemSummaryResponse> problemSummaries = new ArrayList<>();
         for (Long problemId : problemSet.getProblemIds()) {
             Problem problem = problemRepository.findByIdElseThrow(problemId);
-            List<String> tagNames = new ArrayList<>(
+            Set<String> tagNames = new HashSet<>(
                     conceptTagRepository.findAllByIdsElseThrow(problem.getConceptTagIds())
                             .stream()
                             .map(ConceptTag::getName)