Delete image tags and unlink from images

src/main/kotlin/com/android/trisolarisserver/controller/RoomImageTags.kt

@@ -19,6 +19,7 @@ import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.ResponseStatus
 import org.springframework.web.bind.annotation.RestController
 import org.springframework.web.server.ResponseStatusException
+import org.springframework.transaction.annotation.Transactional
 import java.util.UUID
 
 @RestController
@@ -68,16 +69,15 @@ class RoomImageTags(
 
     @DeleteMapping("/{tagId}")
     @ResponseStatus(HttpStatus.NO_CONTENT)
+    @Transactional
     fun deleteTag(
         @PathVariable tagId: UUID,
         @AuthenticationPrincipal principal: MyPrincipal?
     ) {
         requireSuperAdmin(principal)
-        if (roomImageRepo.existsByTagsId(tagId)) {
-            throw ResponseStatusException(HttpStatus.CONFLICT, "Tag is used by images")
-        }
         val tag = roomImageTagRepo.findById(tagId).orElse(null)
             ?: throw ResponseStatusException(HttpStatus.NOT_FOUND, "Tag not found")
+        roomImageRepo.deleteTagLinks(tagId)
         roomImageTagRepo.delete(tag)
     }