Ruby on Rails

class ABC    def self.active        self.live.where('starts_at <= ?', Time.now).where('(ends_at > ? || ends_at IS NULL)', Time.now)      end      def self.recently_completed`        self.completed.where("completed_at > ?", 2.days.ago)`     end

The issue is when I do:

(ABC.active + ABC.recently_completed).columns_hash

This gives error, undefined method `columns_hash' for #<Array:.......

When I do:

(ABC.active).merge(ABC.recently_completed)

The query being run is actually combination of the two. They are not run independently as I expected.

I need a way to write the code as to run the queries separately and then merge the results but not as an array.