Flatten Hash Ruby on Rails

gistfile1.rb

  def flatten_hash hash
    hash.each_with_object({}) do |(k, v), h|
      if v.is_a? Hash
        flatten_hash(v).map do |h_k, h_v|
          h["#{h_k}"] = h_v
        end
      else
        h[k] = v
      end
    end
  end