group member count optimization

lib/tasks/fix_group_member_counts.rake

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+task fix_group_member_counts: 'gabsocial:fix-group-member-counts'
+
+namespace :gabsocial do
+  desc 'Re-compute group member counts'
+  task :fix_group_member_counts => :environment do
+    Group.select(:id).all.each do |group|
+      group.update_column(:member_count, group.accounts.count)
+    end
+  end
+end