[Refactor] Crypto API 식별자를 ID에서 ticker로 변경

src/main/java/com/coanalysis/server/crypto/adapter/in/SearchCryptoController.java

@@ -29,13 +29,13 @@ public ResponseEntity<ApiResponse<List<SearchCryptoResponse>>> searchByKeyword(@
     }
 
     @Override
-    @GetMapping("/{id}")
-    public ResponseEntity<ApiResponse<SearchCryptoResponse>> findById(@PathVariable(value = "id") Long id) {
-        if (ObjectUtils.isEmpty(id)) {
-            throw new CustomException(ErrorCode.INVALID_INPUT_VALUE, "코인 ID가 필요합니다.");
+    @GetMapping("/{ticker}")
+    public ResponseEntity<ApiResponse<SearchCryptoResponse>> findByTicker(@PathVariable(value = "ticker") String ticker) {
+        if (ObjectUtils.isEmpty(ticker)) {
+            throw new CustomException(ErrorCode.INVALID_INPUT_VALUE, "코인 티커가 필요합니다.");
         }
 
-        Crypto crypto = searchCryptoUsecase.findById(id)
+        Crypto crypto = searchCryptoUsecase.findByTicker(ticker)
                 .orElseThrow(() -> new CustomException(ErrorCode.CRYPTO_NOT_FOUND));
 
         return ResponseEntity.ok(ApiResponse.success(SearchCryptoResponse.of(crypto)));

src/main/java/com/coanalysis/server/crypto/adapter/in/swagger/SearchCryptoControllerSwagger.java

@@ -45,15 +45,13 @@ public interface SearchCryptoControllerSwagger {
                                                 "success": true,
                                                 "data": [
                                                     {
-                                                        "id": 1,
                                                         "ticker": "BTC",
                                                         "name": "비트코인",
                                                         "logoUrl": "https://example.com/btc.png",
                                                         "currentPrice": 135000000.0,
                                                         "tradingVolume": 500000000000.0
                                                     },
                                                     {
-                                                        "id": 2,
                                                         "ticker": "BCH",
                                                         "name": "비트코인캐시",
                                                         "logoUrl": "https://example.com/bch.png",
@@ -99,10 +97,12 @@ ResponseEntity<ApiResponse<List<SearchCryptoResponse>>> searchByKeyword(
     @Operation(
             summary = "코인 상세 조회",
             description = """
-                    코인 ID를 기반으로 암호화폐 상세 정보를 조회합니다.
+                    코인 티커를 기반으로 암호화폐 상세 정보를 조회합니다.
 
                     - 코인의 현재가, 거래대금 등 상세 정보를 제공합니다.
-                    - 존재하지 않는 ID로 조회 시 404 에러가 반환됩니다.
+                    - 존재하지 않는 티커로 조회 시 404 에러가 반환됩니다.
+
+                    **티커 예시:** BTC, ETH, XRP, SOL 등
                     """
     )
     @ApiResponses(value = {
@@ -118,7 +118,6 @@ ResponseEntity<ApiResponse<List<SearchCryptoResponse>>> searchByKeyword(
                                             {
                                                 "success": true,
                                                 "data": {
-                                                    "id": 1,
                                                     "ticker": "BTC",
                                                     "name": "비트코인",
                                                     "logoUrl": "https://example.com/btc.png",
@@ -133,18 +132,18 @@ ResponseEntity<ApiResponse<List<SearchCryptoResponse>>> searchByKeyword(
             ),
             @io.swagger.v3.oas.annotations.responses.ApiResponse(
                     responseCode = "400",
-                    description = "잘못된 요청 (ID 누락)",
+                    description = "잘못된 요청 (티커 누락)",
                     content = @Content(
                             mediaType = "application/json",
                             examples = @ExampleObject(
-                                    name = "ID 누락 오류",
+                                    name = "티커 누락 오류",
                                     value = """
                                             {
                                                 "success": false,
                                                 "data": null,
                                                 "error": {
                                                     "code": "INVALID_INPUT_VALUE",
-                                                    "message": "코인 ID가 필요합니다."
+                                                    "message": "코인 티커가 필요합니다."
                                                 }
                                             }
                                             """
@@ -172,11 +171,11 @@ ResponseEntity<ApiResponse<List<SearchCryptoResponse>>> searchByKeyword(
                     )
             )
     })
-    ResponseEntity<ApiResponse<SearchCryptoResponse>> findById(
+    ResponseEntity<ApiResponse<SearchCryptoResponse>> findByTicker(
             @Parameter(
-                    name = "id",
-                    description = "코인 고유 ID",
+                    name = "ticker",
+                    description = "코인 티커 (심볼)",
                     required = true,
-                    example = "1"
-            ) Long id);
+                    example = "BTC"
+            ) String ticker);
 }

src/main/java/com/coanalysis/server/crypto/adapter/out/SearchCryptoAdapter.java

@@ -20,7 +20,7 @@ public List<Crypto> searchByKeyword(String keyword) {
     }
 
     @Override
-    public Optional<Crypto> findById(Long id) {
-        return cryptoRepository.findById(id);
+    public Optional<Crypto> findByTicker(String ticker) {
+        return cryptoRepository.findById(ticker);
     }
 }

src/main/java/com/coanalysis/server/crypto/application/port/in/SearchCryptoUsecase.java

@@ -8,5 +8,5 @@
 public interface SearchCryptoUsecase {
     List<Crypto> searchByKeyword(String keyword);
 
-    Optional<Crypto> findById(Long id);
+    Optional<Crypto> findByTicker(String ticker);
 }

src/main/java/com/coanalysis/server/crypto/application/port/out/SearchCryptoPort.java

@@ -7,5 +7,5 @@
 
 public interface SearchCryptoPort {
     List<Crypto> searchByKeyword(String keyword);
-    Optional<Crypto> findById(Long id);
+    Optional<Crypto> findByTicker(String ticker);
 }

src/main/java/com/coanalysis/server/crypto/application/service/SearchCryptoService.java

@@ -21,7 +21,7 @@ public List<Crypto> searchByKeyword(String keyword) {
     }
 
     @Override
-    public Optional<Crypto> findById(Long id) {
-        return searchCryptoPort.findById(id);
+    public Optional<Crypto> findByTicker(String ticker) {
+        return searchCryptoPort.findByTicker(ticker);
     }
 }

src/main/java/com/coanalysis/server/infrastructure/repository/CryptoRepository.java

@@ -8,7 +8,7 @@
 import java.util.List;
 
 
-public interface CryptoRepository extends JpaRepository<Crypto, Long>, CryptoDslRepository {
+public interface CryptoRepository extends JpaRepository<Crypto, String>, CryptoDslRepository {
 
     @Query("SELECT c FROM Crypto c WHERE c.name LIKE %:keyword% OR c.ticker LIKE %:keyword% ORDER BY c.tradingVolume DESC LIMIT 4")
     List<Crypto> searchByKeyword(@Param("keyword") String keyword);