1 files changed, 6 insertions, 1 deletions
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 8d17a4ebe..869749f1e 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -11,6 +11,8 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
       if lock.acquired?
         @status = find_existing_status
         process_status if @status.nil?
+      else
+        raise Mastodon::RaceConditionError
       end
     end
 
@@ -76,9 +78,12 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     return if tag['name'].blank?
 
     hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
-    hashtag = Tag.where(name: hashtag).first_or_initialize(name: hashtag)
+    hashtag = Tag.where(name: hashtag).first_or_create(name: hashtag)
+
+    return if status.tags.include?(hashtag)
 
     status.tags << hashtag
+    TrendingTags.record_use!(hashtag, status.account, status.created_at)
   rescue ActiveRecord::RecordInvalid
     nil
   end