如何在Ruby上解决未定义的方法“ []”？

我正在尝试为if放置错误数据的用户声明。

这是我的代码：

class Breweries::CLI

  def start 
    puts "Hello!"
    puts "---------------------------"
    puts "Please enter your location:"
    input = gets.strip.downcase
    @data = Breweries::API.get_breweries(input)
    @objects = Breweries::HoppyCode.all 
    if input.length < 1 
      puts "Sorry!!" 
      puts "```````"
      start
    else 
      display_info 
    end
  end 

  def display_info 
    puts "You'll love the following spots!"
    puts "********************************"
    @objects.each.with_index(1) {|brewery, index| puts "#{index}. #{brewery.name}"}  
    puts  "Please make a selection by index number for more information:"
    input = gets.strip.downcase
    if(input.to_i > 0)
      @brewery = @objects[input.to_i - 1]
      puts "name: #{@brewery.name}"
      puts "street: #{@brewery.street}"
      puts "city: #{@brewery.city}"
      puts "phone: #{@brewery.phone}"
      puts "website_url: #{@brewery.website_url}"
      display_info
    elsif (input == "quit")
      quit 
    elsif (input == "menu")
      start
    end
  end

  def quit 
    puts "Goodbye. Drink responsibly and enjoy." 
  end   

end

当我放置会产生错误的内容时，它返回以下内容：

Please enter your location: nvifpejvf80ejvip
 Traceback (most recent call last):
 2: from bin/breweriesCLI:6:in `<main>'
 1: from /home/munificent-format-5297/Development/breweries/lib/breweries/cli.rb:8:in `start' /home/munificent-format-5297/Development/breweries/lib/breweries/api.rb:6:in `get_breweries': undefined method `[]' for nil:NilClass (NoMethodError)

如何解决未定义方法'[]'的错误？如果有必要，这里是API代码。

class Breweries::API

  def self.get_breweries(input)
    @breweries_hash = HTTParty.get("https://api.openbrewerydb.org/breweries?by_city=#{input}")
    breweries_obj = {
      name: @breweries_hash[1]["name"],
      street: @breweries_hash[3]["street"],
      city: @breweries_hash[4]["city"],
      phone: @breweries_hash[10]["phone"],
      website_url: @breweries_hash[11]["website_url"]
    }
    Breweries::HoppyCode.new(breweries_obj)
  end 

end