fix: english_name UK 제거 (#771)

* refactor: (english_name, korean_name) 조합으로 UK 설정하도록

* refactor: 복합 UK 제거, english_name 중복 허용

Author: whqtker

src/main/java/com/example/solidconnection/admin/university/service/AdminHostUniversityService.java

@@ -67,7 +67,6 @@ public AdminHostUniversityDetailResponse getHostUniversity(Long id) {
     )
     public AdminHostUniversityDetailResponse createHostUniversity(AdminHostUniversityCreateRequest request) {
         validateKoreanNameNotExists(request.koreanName());
-        validateEnglishNameNotExists(request.englishName());
 
         Country country = findCountryByCode(request.countryCode());
         Region region = findRegionByCode(request.regionCode());
@@ -98,13 +97,6 @@ private void validateKoreanNameNotExists(String koreanName) {
                 });
     }
 
-    private void validateEnglishNameNotExists(String englishName) {
-        hostUniversityRepository.findByEnglishName(englishName)
-                .ifPresent(existingUniversity -> {
-                    throw new CustomException(HOST_UNIVERSITY_ALREADY_EXISTS);
-                });
-    }
-
     @Transactional
     @DefaultCacheOut(
             key = {"univApplyInfoTextSearch", "university:recommend:general"},
@@ -116,7 +108,6 @@ public AdminHostUniversityDetailResponse updateHostUniversity(Long id, AdminHost
                 .orElseThrow(() -> new CustomException(UNIVERSITY_NOT_FOUND));
 
         validateKoreanNameNotDuplicated(request.koreanName(), id);
-        validateEnglishNameNotDuplicated(request.englishName(), id);
 
         Country country = findCountryByCode(request.countryCode());
         Region region = findRegionByCode(request.regionCode());
@@ -149,15 +140,6 @@ private void validateKoreanNameNotDuplicated(String koreanName, Long excludeId)
                 });
     }
 
-    private void validateEnglishNameNotDuplicated(String englishName, Long excludeId) {
-        hostUniversityRepository.findByEnglishName(englishName)
-                .ifPresent(existingUniversity -> {
-                    if (!existingUniversity.getId().equals(excludeId)) {
-                        throw new CustomException(HOST_UNIVERSITY_ALREADY_EXISTS);
-                    }
-                });
-    }
-
     private Country findCountryByCode(String countryCode) {
         return countryRepository.findByCode(countryCode)
                 .orElseThrow(() -> new CustomException(COUNTRY_NOT_FOUND));

src/main/java/com/example/solidconnection/university/domain/HostUniversity.java

@@ -28,7 +28,7 @@ public class HostUniversity extends BaseEntity {
     @Column(name = "korean_name", nullable = false, unique = true, length = 100)
     private String koreanName;
 
-    @Column(name = "english_name", nullable = false, unique = true, length = 200)
+    @Column(name = "english_name", nullable = false, length = 200)
     private String englishName;
 
     @Column(name = "format_name", nullable = false, length = 100)

src/main/java/com/example/solidconnection/university/repository/HostUniversityRepository.java

@@ -16,6 +16,4 @@ default HostUniversity getHostUniversityById(Long id) {
     }
 
     Optional<HostUniversity> findByKoreanName(String koreanName);
-
-    Optional<HostUniversity> findByEnglishName(String englishName);
 }

src/main/resources/db/migration/V52__add_unique_constraint_to_host_university_english_name.sql

@@ -258,7 +258,7 @@ class 생성 {
         }
 
         @Test
-        void 이미_존재하는_영문명으로_생성하면_예외_응답을_반환한다() {
+        void 이미_존재하는_영문명이어도_한글명이_다르면_생성한다() {
             // given
             HostUniversity existing = universityFixture.괌_대학();
             Country country = countryFixture.미국();
@@ -276,10 +276,12 @@ class 생성 {
                     region.getCode()
             );
 
-            // when & then
-            assertThatCode(() -> adminHostUniversityService.createHostUniversity(request))
-                    .isInstanceOf(CustomException.class)
-                    .hasMessage(ErrorCode.HOST_UNIVERSITY_ALREADY_EXISTS.getMessage());
+            // when
+            AdminHostUniversityDetailResponse response = adminHostUniversityService.createHostUniversity(request);
+
+            // then
+            assertThat(response.koreanName()).isEqualTo(request.koreanName());
+            assertThat(response.englishName()).isEqualTo(existing.getEnglishName());
         }
     }
 
@@ -367,7 +369,7 @@ class 수정 {
         }
 
         @Test
-        void 다른_대학의_영문명으로_수정하면_예외_응답을_반환한다() {
+        void 다른_대학의_영문명이어도_한글명이_다르면_수정한다() {
             // given
             HostUniversity university1 = universityFixture.괌_대학();
             HostUniversity university2 = universityFixture.메이지_대학();
@@ -384,10 +386,13 @@ class 수정 {
                     university1.getRegion().getCode()
             );
 
-            // when & then
-            assertThatCode(() -> adminHostUniversityService.updateHostUniversity(university1.getId(), request))
-                    .isInstanceOf(CustomException.class)
-                    .hasMessage(ErrorCode.HOST_UNIVERSITY_ALREADY_EXISTS.getMessage());
+            // when
+            AdminHostUniversityDetailResponse response = adminHostUniversityService.updateHostUniversity(
+                    university1.getId(), request);
+
+            // then
+            assertThat(response.koreanName()).isEqualTo(university1.getKoreanName());
+            assertThat(response.englishName()).isEqualTo(university2.getEnglishName());
         }
 
         @Test