#399

backend/app/services/post_thumbnail_upload_validator.rb

@@ -1,12 +1,14 @@
 class PostThumbnailUploadValidator
   MAX_THUMBNAIL_BYTES = 20 * 1024 * 1024
-  ALLOWED_CONTENT_TYPES = Preview::ThumbnailFetcher::ALLOWED_IMAGE_CONTENT_TYPES.freeze
+  ALLOWED_CONTENT_TYPES = Preview::ThumbnailFetcher::RASTER_IMAGE_CONTENT_TYPES.freeze
 
   class InvalidUpload < StandardError; end
 
   def self.validate! thumbnail
     return if thumbnail.blank?
-    raise InvalidUpload, 'thumbnail upload が不正です．' unless thumbnail.is_a?(ActionDispatch::Http::UploadedFile)
+    unless thumbnail.is_a?(ActionDispatch::Http::UploadedFile)
+      raise InvalidUpload, 'thumbnail upload が不正です．'
+    end
     raise InvalidUpload, 'thumbnail file size が大きすぎます．' if thumbnail.size > MAX_THUMBNAIL_BYTES
     raise InvalidUpload, 'サムネイル画像の形式が不正です．' unless allowed_content_type?(thumbnail.content_type)