Prevent duplicate boosts from appearing in local feed - only show mos…

…t recent boost

app/models/public_feed.rb

@@ -25,6 +25,7 @@ def get(limit, max_id = nil, since_id = nil, min_id = nil)
     scope.merge!(without_local_only_scope) unless allow_local_only?
     scope.merge!(without_replies_scope) unless with_replies?
     scope.merge!(without_reblogs_scope) unless with_reblogs?
+    scope.merge!(without_duplicate_reblogs) if with_reblogs?
     scope.merge!(local_only_scope) if local_only?
     scope.merge!(remote_only_scope) if remote_only?
     scope.merge!(account_filters_scope) if account?
@@ -90,6 +91,11 @@ def without_reblogs_scope
     Status.without_reblogs
   end
 
+  def without_duplicate_reblogs
+    Status.where(statuses: { reblog_of_id: nil })
+          .or(Status.where(id: Status.select('DISTINCT ON (reblog_of_id) statuses.id').reorder(reblog_of_id: :desc, id: :desc)))
+  end
+
   def media_only_scope
     Status.joins(:media_attachments).group(:id)
   end