Reset status cache when status_stat or media_attachment updates (#9119)

* Reset status cache when status_stat or media_attachment updates

Fix #8711

Media attachments are generally immutable, but admins can update
the sensitive flag, and this would ensure the change is visible
instantly. Same for updates to status stats. That is a regression
from #8185, because even the correct updated_at fetched from a join
doesn't seem to invalidate the cache.

* Remove join from Status#cache_ids since it has no effect

1 files changed, 6 insertions, 0 deletions

diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index 1e4fae3de..1bfe02fd6 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -130,6 +130,7 @@ class MediaAttachment < ApplicationRecord
     "#{x},#{y}"
   end
 
+  after_commit :reset_parent_cache, on: :update
   before_create :prepare_description, unless: :local?
   before_create :set_shortcode
   before_post_process :set_type_and_extension
@@ -230,4 +231,9 @@ class MediaAttachment < ApplicationRecord
       bitrate: movie.bitrate,
     }
   end
+
+  def reset_parent_cache
+    return if status_id.nil?
+    Rails.cache.delete("statuses/#{status_id}")
+  end
 end