[refactor/#83] 문제 조회 fetchjoin

Author: sejoon00

src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ChildProblemMapperImpl.java

@@ -11,7 +11,7 @@
 
 @Generated(
     value = "org.mapstruct.ap.MappingProcessor",
-    date = "2025-03-03T17:28:35+0900",
+    date = "2025-03-04T02:15:33+0900",
     comments = "version: 1.6.3, compiler: javac, environment: Java 17.0.10 (JetBrains s.r.o.)"
 )
 @Component

src/main/generated/com/moplus/moplus_server/domain/problem/service/mapper/ProblemMapperImpl.java

@@ -15,7 +15,7 @@
 
 @Generated(
     value = "org.mapstruct.ap.MappingProcessor",
-    date = "2025-03-03T17:28:35+0900",
+    date = "2025-03-04T02:15:33+0900",
     comments = "version: 1.6.3, compiler: javac, environment: Java 17.0.10 (JetBrains s.r.o.)"
 )
 @Component

src/main/generated/com/moplus/moplus_server/domain/v0/TestResult/entity/QIncorrectProblem.java

@@ -37,7 +37,7 @@ public class QIncorrectProblem extends EntityPathBase<IncorrectProblem> {
 
     public final NumberPath<Long> practiceTestId = createNumber("practiceTestId", Long.class);
 
-    public final NumberPath<Long> problemId = createNumber("problemCustomId", Long.class);
+    public final NumberPath<Long> problemId = createNumber("problemId", Long.class);
 
     public final StringPath problemNumber = createString("problemNumber");
 

src/main/generated/com/moplus/moplus_server/domain/v0/practiceTest/domain/QProblemImageForTest.java

@@ -25,7 +25,7 @@ public class QProblemImageForTest extends EntityPathBase<ProblemImageForTest> {
 
     public final StringPath imageUrl = createString("imageUrl");
 
-    public final NumberPath<Long> problemId = createNumber("problemCustomId", Long.class);
+    public final NumberPath<Long> problemId = createNumber("problemId", Long.class);
 
     public QProblemImageForTest(String variable) {
         super(ProblemImageForTest.class, forVariable(variable));

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

@@ -75,7 +75,7 @@ public class Problem extends BaseEntity {
 
     private boolean isConfirmed;
 
-    @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.LAZY)
+    @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER)
     @JoinColumn(name = "problem_id")
     @OrderColumn(name = "sequence")
     private List<ChildProblem> childProblems = new ArrayList<>();

src/main/java/com/moplus/moplus_server/domain/problem/repository/ProblemRepository.java

@@ -4,7 +4,10 @@
 import com.moplus.moplus_server.domain.problem.domain.problem.ProblemCustomId;
 import com.moplus.moplus_server.global.error.exception.ErrorCode;
 import com.moplus.moplus_server.global.error.exception.NotFoundException;
+import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 public interface ProblemRepository extends JpaRepository<Problem, Long> {
 
@@ -22,7 +25,18 @@ default void existsByProblemAdminIdElseThrow(ProblemCustomId problemCustomId) {
         }
     }
 
+    @Query("SELECT DISTINCT p FROM Problem p " +
+            "LEFT JOIN FETCH p.childProblems c " +
+            "LEFT JOIN FETCH p.conceptTagIds " +
+            "LEFT JOIN FETCH c.conceptTagIds " +
+            "WHERE p.id = :id")
+    Optional<Problem> findByIdWithFetchJoin(@Param("id") Long id);
+
     default Problem findByIdElseThrow(Long id) {
         return findById(id).orElseThrow(() -> new NotFoundException(ErrorCode.PROBLEM_NOT_FOUND));
     }
+
+    default Problem findByIdWithFetchJoinElseThrow(Long id) {
+        return findByIdWithFetchJoin(id).orElseThrow(() -> new NotFoundException(ErrorCode.PROBLEM_NOT_FOUND));
+    }
 }

src/main/java/com/moplus/moplus_server/domain/problem/service/ProblemGetService.java

@@ -15,7 +15,7 @@ public class ProblemGetService {
 
     @Transactional(readOnly = true)
     public ProblemGetResponse getProblem(Long problemId) {
-        Problem problem = problemRepository.findByIdElseThrow(problemId);
+        Problem problem = problemRepository.findByIdWithFetchJoinElseThrow(problemId);
         return ProblemGetResponse.of(problem);
     }
 }