Can't find first MyFreakingActiveRecordModel....

shoulda_cant_find_first.rb

### Terminal Output showing spec failure ###
Failures:
  1) CurrencyConverter#validations 
     Failure/Error: it { should validate_uniqueness_of(:from).scoped_to(:to) }
       Can't find first CurrencyConverter
     # ./spec/models/currency_converter_spec.rb:4:in `block (3 levels) in <top (required)>'


###########################################
           ### The Solution ###
###########################################

### currency_converter.rb ###
class CurrencyConverter < ActiveRecord::Base
  validates_uniqueness_of :from, :scope => :to
end


### currency_converter_spec.rb ###
describe CurrencyConverter do
  describe "#validations" do 
    subject { Factory(:currency_converter) }  # Comment this line and you get spec failure shown in the Terminal Output above
    it { should validate_uniqueness_of(:from).scoped_to(:to) }
  end
end


### factories.rb ###
Factory.define(:currency_converter) do |cc|
  cc.rate 100
  cc.from "INR"
  cc.to "SGD"
end