♻️ market 수정 api 수정

src/main/java/com/hackathon/tomolow/domain/market/dto/request/MarketUpdateRequest.java

@@ -33,4 +33,7 @@ public class MarketUpdateRequest {
 
   @Schema(description = "새 거래소(옵션)", example = "UPBIT")
   private ExchangeType newExchangeType;
+
+  @Schema(description = "새 심볼(옵션)", example = "KRW-0G")
+  private String newSymbol; // 필요할 때만 사용
 }

src/main/java/com/hackathon/tomolow/domain/market/entity/Market.java

@@ -47,6 +47,10 @@ public class Market extends BaseTimeEntity {
   private String imgUrl; // 주식 이미지 (nullable)
 
   // set methods
+  public void setSymbol(String symbol) {
+    this.symbol = symbol;
+  }
+
   public void setName(String name) {
     this.name = name;
   }

src/main/java/com/hackathon/tomolow/domain/market/repository/MarketRepository.java

@@ -12,6 +12,8 @@ public interface MarketRepository extends JpaRepository<Market, Long> {
 
   Optional<Market> findBySymbol(String symbol);
 
+  Optional<Market> findByName(String name);
+
   boolean existsBySymbol(String symbol);
 
   // 업비트에 등록된 마켓만 가져오기

src/main/java/com/hackathon/tomolow/domain/market/service/MarketDevService.java

@@ -57,10 +57,25 @@ public MarketResponse findOne(String symbol) {
 
   @Transactional
   public MarketResponse update(MarketUpdateRequest req) {
+    // 우선 symbol 기준으로 찾기
     Market market =
         marketRepository
             .findBySymbol(req.getSymbol())
-            .orElseThrow(() -> new CustomException(MarketErrorCode.MARKET_NOT_FOUND));
+            // 없으면 name 기준으로 한 번 더 찾기
+            .orElseGet(
+                () ->
+                    marketRepository
+                        .findByName(req.getSymbol())
+                        .orElseThrow(() -> new CustomException(MarketErrorCode.MARKET_NOT_FOUND)));
+
+    // 3️⃣ (선택) 심볼도 바꾸고 싶을 때
+    if (req.getNewSymbol() != null && !req.getNewSymbol().isBlank()) {
+      // 중복 심볼 체크
+      if (marketRepository.existsBySymbol(req.getNewSymbol())) {
+        throw new CustomException(MarketErrorCode.MARKET_ALREADY_EXISTS);
+      }
+      market.setSymbol(req.getNewSymbol());
+    }
 
     if (req.getNewName() != null) {
       market.setName(req.getNewName());