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: mailings_controller.rb
    path of file: ./repos/rgsoc-teams/app/controllers/organizers
    
    the code of the file until where you have to start completion: # frozen_string
    
    def create
      @mailing = Mailing.new(mailing_params)
      if @mailing.save
        redirect_to organizers_mailing_path(@mailing), notice: 'Mailing was successfully created.'
      else
        render action: :new
      end