gistfile1.txt

class ActiveRecord::Base
  def self.fake_model(*columns_arr)
    alias_method :save, :valid?

    def columns
      @columns ||= []
    end
    
    @columns ||= []

    columns_arr.each do |name|
      columns << ActiveRecord::ConnectionAdapters::Column.new(name.to_s, '', 'string', true)
    end
  end
end