rails api how to fill headers in request - ruby-on-rails

Question

I don't understand what I do wrong. I want to send a simple request to an API, and it didn't work:
class Paytrace
require 'rest-client'
attr_reader :auth_token, :authorize
def initialize()
#auth_token = auth_token
end
def auth_token
response = RestClient.post 'https://api.paytrace.com/oauth/token', { grant_type: :password, username: "loginname", password: "htmlkoi8r" }
puts response
end
def authorize
headers = {:Authorization => "Bearer #{auth_token['access_token']}"}
response1 = RestClient.get('https://api.paytrace.com/v1/transactions/sale/keyed', headers)
puts response1
end
end
a = Paytrace.new
a.authorize
console.log
lucker#lucker-pc:~/git/paytrace-testh$ ruby integration.rb
{"access_token":"c6d69786f6075633:8647d6c6b6f6968327:092e8cfc553726d2b8198577ea2836f41173aae68a53aa1d2af2b2c7f65dcdc7","token_type":"Bearer","expires_in":7200,"created_at":1556098344}
{"access_token":"c6d69786f6075633:8647d6c6b6f6968327:232c92f977a301d033eec321c3d82b73bb65ebec33f9fcc8f6c2d7575c8b0d88","token_type":"Bearer","expires_in":7200,"created_at":1556098346}
Traceback (most recent call last): 1: from integration.rb:25:in
<main>' integration.rb:16:inauthorize': undefined method `[]' for
nil:NilClass (NoMethodError)
Why is the access_token generated twice?
Why is there an undefined method '[]' for nil:NilClass?

Answer 1

Your method auth_token is not returning a response, but a nil (puts returns nil).
Btw, you don't need attr_reader :authorize since you have a method with that name.
Also, as you are setting attr_reader :auth_token, the method auth_token must be rename (and maybe become private).
Change your code to:
class Paytrace
require 'rest-client'
attr_reader :auth_token
def initialize()
#auth_token = get_auth_token
end
def authorize
headers = {:Authorization => "Bearer #{auth_token['access_token']}"}
RestClient.get('https://api.paytrace.com/v1/transactions/sale/keyed', headers)
end
private
def get_auth_token
RestClient.post 'https://api.paytrace.com/oauth/token', { grant_type: :password, username: "loginname", password: "htmlkoi8r" }
end
end
a = Paytrace.new
puts a.auth_token
puts a.authorize

Answer 2

Seems like there are 3 mistakes in this code the 2 puts. line 12 and 20
and the
headers = {:Authorization => "Bearer #{auth_token['access_token']}"}
should be
headers = {:Authorization => "Bearer #{auth_token[:access_token]}"}
or
headers = {:Authorization => "Bearer #{#auth_token[:access_token]}"}
try this code
class Paytrace
require 'rest-client'
attr_reader :auth_token, :authorize
def initialize()
#auth_token = auth_token
end
def auth_token
response = RestClient.post 'https://api.paytrace.com/oauth/token', { grant_type: :password, username: "loginname", password: "htmlkoi8r" }
# puts response
end
def authorize
headers = {:Authorization => "Bearer #{#auth_token[:access_token]}"}
response1 = RestClient.get('https://api.paytrace.com/v1/transactions/sale/keyed', headers)
# puts response1
end
end
a = Paytrace.new
a.authorize
take care the your response hash if you check is
{:access_token=>"c6d69786f6075633:8647d6c6b6f6968327:092e8cfc553726d2b8198577ea2836f41173aae68a53aa1d2af2b2c7f65dcdc7",
:token_type=>"Bearer",
:expires_in=>7200,
:created_at=>1556098344}
and not
{"access_token":"c6d69786f6075633:8647d6c6b6f6968327:092e8cfc553726d2b8198577ea2836f41173aae68a53aa1d2af2b2c7f65dcdc7","token_type":"Bearer","expires_in":7200,"created_at":1556098344}