error

/api/v1 Trans::Throttle total processing restrictions declines after processing restriction being hit
     Failure/Error: get "/api/v1", data
     NoMethodError:
       undefined method `where' for nil:NilClass
     # ./lib/trans/throttle.rb:75:in `do_total_processing_restrictions'
     # ./lib/trans/throttle.rb:64:in `block in run'
     # ./lib/trans/throttle.rb:44:in `each'
     # ./lib/trans/throttle.rb:44:in `each_with_index'
     # ./lib/trans/throttle.rb:44:in `run'
     # ./lib/trans/throttle.rb:8:in `initialize'
     # ./lib/trans/api.rb:46:in `new'
     # ./lib/trans/api.rb:46:in `run'
     # ./app/controllers/api.rb:8:in `block (2 levels) in <top (required)>'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/application/routing.rb:504:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/application/routing.rb:504:in `block in route'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:33:in `[]'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:33:in `block (3 levels) in process_destination_path'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:985:in `route_eval'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:33:in `block (2 levels) in process_destination_path'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:33:in `catch'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:33:in `block in process_destination_path'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:8:in `instance_eval'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/ext/http_router.rb:8:in `process_destination_path'
     # (eval):142:in `block in call'
     # (eval):131:in `catch'
     # (eval):131:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/http_router-0.11.1/lib/http_router.rb:288:in `raw_call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/http_router-0.11.1/lib/http_router.rb:142:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/application/routing.rb:931:in `route!'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/application/routing.rb:915:in `block in dispatch!'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `block in invoke'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `catch'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `invoke'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/application/routing.rb:913:in `dispatch!'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:898:in `block in call!'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `block in invoke'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `catch'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1058:in `invoke'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:898:in `call!'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:886:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:186:in `call!'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:164:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/omniauth-1.2.2/lib/omniauth/builder.rb:59:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/xss_header.rb:18:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/json_csrf.rb:18:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-protection-1.5.3/lib/rack/protection/frame_options.rb:31:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-1.6.0/lib/rack/head.rb:13:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-1.6.0/lib/rack/methodoverride.rb:22:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:225:in `context'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:220:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:2014:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1478:in `block in call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1788:in `synchronize'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/sinatra-1.4.5/lib/sinatra/base.rb:1478:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/router.rb:84:in `block in call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/router.rb:75:in `each'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/padrino-core-0.12.4/lib/padrino-core/router.rb:75:in `call'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-test-0.6.3/lib/rack/mock_session.rb:30:in `request'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-test-0.6.3/lib/rack/test.rb:244:in `process_request'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/rack-test-0.6.3/lib/rack/test.rb:58:in `get'
     # ./spec/app/controllers/api_spec.rb:267:in `do_purchase'
     # ./spec/app/controllers/api_spec.rb:248:in `block (5 levels) in <top (required)>'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.0/lib/active_support/core_ext/range/each.rb:7:in `each'
     # /Users/uptown/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.0/lib/active_support/core_ext/range/each.rb:7:in `each_with_time_with_zone'
     # ./spec/app/controllers/api_spec.rb:243:in `block (4 levels) in <top (required)>'

gistfile1.rb

class Transaction < Sequel::Model
  plugin :timestamps
  many_to_many :batches
end
  

throttle.rb

module Trans
  class Throttle
    attr_reader :errors

    def initialize(transaction = nil)
      @errors = []
      if !transaction.nil?
        run(transaction)
      end
    end

    # adds to errors
    def has_error (name, error)
      @errors.push({:name => name, :error => error})
    end

    # get list of all the fraud throttles
    def get_throttles
      throttles = [
          {name: 'total_processing_restrictions', label: 'Total Processing Restrictions (including declines)'},
          {name: 'processing_restrictions', label: 'Processing restrictions'},
          {name: 'refund_restrictions', label: 'Refund restrictions'},
          {name: 'charges_per_card', label: 'Charges per card restrictions'},
          {name: 'min_max_price', label: 'Min Max Price'},
          {name: 'ip_velocity', label: 'IP Velocity'},
          {name: 'card_velocity', label: 'Card Velocity'},
          {name: 'bin_overuse', label: 'Bin Overuse'},
          {name: 'cards_per_email', label: 'Cards per email'}

      ]
      return throttles
    end

    # run throttle from mid's throttle_data
    def run(transaction)
      @transaction = transaction
      @throttles = get_throttles
      @mid_id = @transaction.params[:mid_id]
      @currency = @transaction.params[:currency]
      @mid_throttles = @transaction.data[:throttle_data]

      # loop through all fraud throttles and then run those where the mid have activated them
      if !@throttles.nil?
        @throttles.each_with_index do |obj|
          name = obj[:name]

          #map to arrays
          throttle_arr = @mid_throttles.map {|t| t[1] }

          #select matching currencies
          throttle = throttle_arr.find do |t|
            if t.keys.empty?
              false
            else
              t[t.keys[0]]["currency"] == @currency && t.keys[0].to_s == name
            end
          end

          #run throttle rule
          if throttle
            rule = throttle.keys[0]
            data = throttle[rule]

            self.send("do_#{rule}", data)
          end
        end
      end
    end

    # fraud throttle methods
    def do_total_processing_restrictions data
      if ['auth','purchase'].include?(@transaction.params[:type])
        threshold = data["num"].to_i
        if threshold
          value = ::Transaction.where(:mid_id => @mid_id).where(:type => ['purchase', 'authorization']).count
        
          if value > threshold
            has_error('total_processing_restrictions(count)', "value: #{value}, threshold: #{threshold}")
          end
        end
      end
    end
  end
end