[fix/#54] 문항 추천시간 0으로 초기화 변경

src/main/java/com/moplus/moplus_server/domain/problem/domain/childProblem/ChildProblem.java

@@ -61,7 +61,7 @@ public static ChildProblem createEmptyChildProblem() {
     }
 
     public void validateAnswerByType(String answer, AnswerType answerType) {
-        if (this.answerType == AnswerType.MULTIPLE_CHOICE) {
+        if (answerType == AnswerType.MULTIPLE_CHOICE) {
             if (!answer.matches("^[1-5]*$")) {
                 throw new InvalidValueException(ErrorCode.INVALID_MULTIPLE_CHOICE_ANSWER);
             }

src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/Problem.java

@@ -89,10 +89,10 @@ public Problem(List<ChildProblem> childProblems, boolean isConfirmed, AnswerType
                    List<String> prescriptionImageUrls, String seniorTipImageUrl, String readingTipImageUrl,
                    String mainAnalysisImageUrl, String mainProblemImageUrl, String memo, String answer, String title,
                    ProblemType problemType, int number, PracticeTestTag practiceTestTag,
-                   ProblemCustomId problemCustomId, Integer recommendedMinute, Integer recommendedSecond) {
+                   ProblemCustomId problemCustomId) {
         this.childProblems = childProblems;
         this.isConfirmed = isConfirmed;
-        this.answerType = answerType;
+        this.answerType = AnswerType.SHORT_ANSWER;
         this.conceptTagIds = conceptTagIds;
         this.mainHandwritingExplanationImageUrl = mainHandwritingExplanationImageUrl;
         this.prescriptionImageUrls = prescriptionImageUrls;
@@ -102,17 +102,17 @@ public Problem(List<ChildProblem> childProblems, boolean isConfirmed, AnswerType
         this.mainProblemImageUrl = mainProblemImageUrl;
         this.difficulty = new Difficulty(difficulty);
         this.memo = memo;
-        this.answer = new Answer(answer, this.answerType);
+        this.answer = new Answer("0", this.answerType);
         this.title = new Title(title);
         this.problemType = problemType;
         this.number = number;
         this.practiceTestId = practiceTestTag != null ? practiceTestTag.getId() : null;
         this.problemCustomId = problemCustomId;
-        this.recommendedTime = new RecommendedTime(recommendedMinute, recommendedSecond);
+        this.recommendedTime = new RecommendedTime(0, 0);
     }
 
     public String getAnswer() {
-        return answer.getValue();
+        return this.answer != null ? answer.getValue() : null;
     }
 
     public void update(Problem inputProblem) {
@@ -133,8 +133,8 @@ public void update(Problem inputProblem) {
         this.prescriptionImageUrls = inputProblem.getPrescriptionImageUrls();
         this.answerType = inputProblem.getAnswerType();
         this.recommendedTime = new RecommendedTime(
-            inputProblem.getRecommendedTime() != null ? inputProblem.getRecommendedTime().getMinute() : null,
-            inputProblem.getRecommendedTime() != null ? inputProblem.getRecommendedTime().getSecond() : null
+                inputProblem.getRecommendedTime().getMinute(),
+                inputProblem.getRecommendedTime().getSecond()
         );
     }
 

src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/RecommendedTime.java

@@ -19,8 +19,8 @@ public class RecommendedTime {
 
     public RecommendedTime(Integer minute, Integer second) {
         validateTime(minute, second);
-        this.minute = minute;
-        this.second = second;
+        this.minute = minute != null ? minute : 0;
+        this.second = second != null ? second : 0;
     }
 
     private void validateTime(Integer minute, Integer second) {

src/main/java/com/moplus/moplus_server/domain/problem/repository/converter/StringListConverter.java

@@ -19,7 +19,7 @@ public class StringListConverter implements AttributeConverter<List<String>, Str
     public String convertToDatabaseColumn(List<String> attribute) {
         try {
             if (attribute == null || attribute.isEmpty()) {
-                return "";
+                return "[]";
             }
             return attribute.stream()
                     .filter(str -> str != null && !str.isEmpty())