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: date.rb
    path of file: ./repos/phishin/app/controllers/concerns/ambiguity
    
    the code of the file until where you have to start completion: module Ambiguity::Date
    
  def track_from_show
    return if params[:anchor].blank?
    Track.joins(:show)
         .where(show: { date: current_slug })
         .where(slug: params[:anchor])
         .first
  end