cannot load such file - Nokogiri rails

Question

I wrote a Ruby script in which I use Nokogiri.

For Rails I made this module in the lib/ directory:

require "net/http"
require "uri"
require 'nokogiri'

Module gk_CT

class CT

  def getCT
    uri = URI.parse("http://www.website.com")
    CT = Net::HTTP.get_response(uri)

    proc = Nokogiri::HTML(CT.body)

    CTQ = Array.new

    CTQ << proc.css('td')

  end

end

In the controller I have:

require 'gk_CT'

  def show
    @CT= gk_CT::CT.getCT()
    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @CT}
    end
  end

It always gives me the error:

cannot load such file -- nokogiri

and I have no idea why.

Answer 1

If the script is part of an actual Rails project, then you need to add Nokogiri to the Gemfile (with the line gem 'nokogiri' ). If you're not in a Rails project or aren't using Bundler or some such weird thing, you'll still need to install the gem ( gem install nokogiri ).