NoMethodError: undefined method `sort` from Twilio voice example - ruby-on-rails

Question

I am trying to set up an example Twilio Rails project that calls a person. I am following the tutorial associated with this repo and have basically a carbon copy of the codebase. I'm getting an error that I think is from this line #validator = Twilio::Util::RequestValidator.new(##twilio_token).
Here's my twilio_controller.rb
class TwilioController < ApplicationController
# Before we allow the incoming request to connect, verify
# that it is a Twilio request
skip_before_action :verify_authenticity_token
before_action :authenticate_twilio_request, :only => [
:connect
]
##twilio_sid = ENV['TWILIO_ACCOUNT_SID']
##twilio_token = ENV['TWILIO_AUTH_TOKEN']
##twilio_number = ENV['TWILIO_NUMBER']
##api_host = ENV['TWILIO_HOST']
# Render home page
def index
render 'index'
end
def voice
response = Twilio::TwiML::Response.new do |r|
r.Say "Yay! You're on Rails!", voice: "alice"
r.Sms "Well done building your first Twilio on Rails 5 app!"
end
render :xml => response.to_xml
end
# Handle a POST from our web form and connect a call via REST API
def call
contact = Contact.new
contact.user_phone = params[:userPhone]
contact.sales_phone = params[:salesPhone]
# Validate contact
if contact.valid?
#client = Twilio::REST::Client.new ##twilio_sid, ##twilio_token
# Connect an outbound call to the number submitted
#call = #client.calls.create(
:from => ##twilio_number,
:to => contact.user_phone,
:url => "#{##api_host}/connect/#{contact.encoded_sales_phone}" # Fetch instructions from this URL when the call connects
)
# Let's respond to the ajax call with some positive reinforcement
#msg = { :message => 'Phone call incoming!', :status => 'ok' }
else
# Oops there was an error, lets return the validation errors
#msg = { :message => contact.errors.full_messages, :status => 'ok' }
end
respond_to do |format|
format.json { render :json => #msg }
end
end
# This URL contains instructions for the call that is connected with a lead
# that is using the web form.
def connect
# Our response to this request will be an XML document in the "TwiML"
# format. Our Ruby library provides a helper for generating one
# of these documents
response = Twilio::TwiML::Response.new do |r|
r.Say 'FUCK.', :voice => 'alice'
# r.Dial params[:sales_number]
end
render text: response.text
end
# Authenticate that all requests to our public-facing TwiML pages are
# coming from Twilio. Adapted from the example at
# http://twilio-ruby.readthedocs.org/en/latest/usage/validation.html
# Read more on Twilio Security at https://www.twilio.com/docs/security
private
def authenticate_twilio_request
twilio_signature = request.headers['HTTP_X_TWILIO_SIGNATURE']
# Helper from twilio-ruby to validate requests.
#validator = Twilio::Util::RequestValidator.new(##twilio_token)
# the POST variables attached to the request (eg "From", "To")
# Twilio requests only accept lowercase letters. So scrub here:
post_vars = params.reject {|k, v| k.downcase == k}
is_twilio_req = #validator.validate(request.url, post_vars, twilio_signature)
unless is_twilio_req
render :xml => (Twilio::TwiML::Response.new {|r| r.Hangup}).text, :status => :unauthorized
false
end
end
end
Error image:
I am using ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin15] and Rails 5.1.0.

Answer 1

Your code is most likely failing at is_twilio_req = #validator.validate(request.url, post_vars, twilio_signature) because upon inspection of the gem's code, it is failing at sort below
data = url + params.sort.join
This is because in Rails 5.1, ActionController::Parameters no longer inherits from Hash, so Hash methods like sort (see Hash docs) will no longer work.
You will need to convert params into hash explicitly:
def authenticate_twilio_request
twilio_signature = request.headers['HTTP_X_TWILIO_SIGNATURE']
#validator = Twilio::Util::RequestValidator.new(##twilio_token)
# convert `params` which is an `ActionController::Parameters` object into `Hash`
# you will need `permit!` to strong-params-permit EVERYTHING so that they will be included in the converted `Hash` (you don't need to specifically whitelist specific parameters for now as the params are used by the Twilio gem)
params_hash = params.permit!.to_hash
post_vars = params_hash.reject {|k, v| k.downcase == k}
is_twilio_req = #validator.validate(request.url, post_vars, twilio_signature)
unless is_twilio_req
render :xml => (Twilio::TwiML::Response.new {|r| r.Hangup}).text, :status => :unauthorized
false
end
end