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Authorize Net (AIM) payment integration with rails

Authorize Net (AIM) method enables internet merchants to accept online payments via credit card.

Below post will show you how to integrate authorize net payment gateway inside rails app to accept

online payments using activemerchant library.

# Gemfile

gem 'activemerchant', :require => 'active_merchant'

Register for authorize net sandbox account <a

href='https://developer.authorize.net/testaccount/'>click here</a>

Payment gateway credentials

# config/authorize_net.yml

development: &development

mode: testlogin: 9gdLh6T

key: 67fu45xw6VP92LX1

 production:

<<: *development

test:

<<: *development

Payment & creditcard form

# app/views/payments/new

= form_for @payment, :url => payments_url do |f|

= f.text_field :amount

= fields_for :creditcard, @creditcard do |cc|

= cc.text_field :name

= cc.text_field :number 

= cc.select :month, Date::ABBR_MONTHNAMES.compact.each_with_index.collect{|m, i| [m,

i+1]}, {:prompt => 'Select'}

= cc.select :year, Array.new(15){|i| Date.current.year+i}, {:prompt => 'Select'}= cc.text_field :verification_value

= f.submit 'Pay'

Payments Controller

# app/controllers/payments_controller.rb

class PaymentsController < ApplicationController 

def new

@payment = Payment.new

@creditcard = ActiveMerchant::Billing::CreditCard.newend

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def create

@payment = Payment.new(params[:payment])

@creditcard = ActiveMerchant::Billing::CreditCard.new(params[:creditcard])

@payment.valid_card = @creditcard.valid?

if @payment.valid?

@payment = @payment.process_payment(@creditcard)

if @payment.success?@payment.save

flash[:notice] = I18n.t('payment.success')

redirect_to payments_url and return

else

flash[:error] = I18n.t('payment.failed')

end

end

render :action => :new

end

end

Generate & Migrate Payment Model

rails g model payment status:string amount:float transaction_number:string

rake db:migrate

Payment Model

# app/models/payment.rb

class Payment < ActiveRecord::Base

PROCESSING, FAILED, SUCCESS = 1, 2, 3

validates :valid_card, :inclusion => {:in => [true], :message => 'Invalid Credit Card'}

validates :amount, :presence => true, :numericality => { :greater_than => 0 }

def process_payment(creditcard)

ActiveMerchant::Billing::Base.mode = auth['mode'].to_sym

self.status = PROCESSING

response = gateway.purchase(amount * 100, creditcard)

if response.success?

self.transaction_number = response.subscription_id

self.status = SUCCESS

else

self.status = FAILED

end

return self 

rescue Exception => e

self.status = FAILED

return self 

end

def success?

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self.status == SUCCESS

end

private

def gateway

ActiveMerchant::Billing::AuthorizeNetGateway.new(

:login => auth['login'],:password => auth['key'])

end

def auth

@@auth ||= YAML.load_file("#{Rails.root}/config/authorize_net.yml")[Rails.env]

end

end