uploads: fix media_asset_count.

app/models/upload.rb

@@ -100,7 +100,7 @@ class Upload < ApplicationRecord
     end
 
     media_asset = MediaAsset.upload!(media_file)
-    update!(media_assets: [media_asset], status: "completed")
+    update!(media_assets: [media_asset], status: "completed", media_asset_count: 1)
   rescue Exception => e
     update!(status: "error", error: e.message)
   end

script/fixes/101_fix_media_asset_count.rb

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+
+require_relative "base"
+
+with_confirmation do
+  # Fix uploads that have a non-zero media_asset_count but no media assets.
+  records = Upload.where("media_asset_count != 0").where.not(id: UploadMediaAsset.select(:upload_id).distinct)
+  puts "Fixing #{records.size} records"
+  records.update_all(media_asset_count: 0)
+end
+
+with_confirmation do
+  # Fix uploads that have a media_asset_count inconsistent with the upload_media_assets table.
+  records = Upload.find_by_sql(<<~SQL.squish)
+    UPDATE uploads
+    SET media_asset_count = true_count
+    FROM (
+      SELECT upload_id, COUNT(*) AS true_count
+      FROM upload_media_assets
+      GROUP BY upload_id
+    ) true_counts
+    WHERE uploads.id = upload_id AND uploads.media_asset_count != true_count
+    RETURNING uploads.*
+  SQL
+
+  puts "Fixing #{records.size} records"
+end