You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: daily_frequencies_in_batchs_controller.rb
    path of file: ./repos/i-diario/app/controllers
    
    the code of the file until where you have to start completion: class DailyFrequenciesInBa
    
  def require_valid_dates
    start_date = params[:frequency_in_batch_form][:start_date].to_date
    end_date = params[:frequency_in_batch_form][:end_date].to_date

    if invalid_dates?(start_date, end_date)
      redirect_to(new_daily_frequencies_in_batch_path) and return
    end