added badge, reduced complexity

README.markdown

@@ -1,6 +1,9 @@
 Konto API Rails Validator
 =========================
 
+[![Gem Version](https://badge.fury.io/rb/kontoapi-rails.png)](http://badge.fury.io/rb/kontoapi-rails)
+
+
 This library is a wrapper for the Konto API (https://www.kontoapi.de/).
 It provides a validation method for ActiveRecord models that checks if a given account number and bank code represent a valid combination.
 

lib/kontoapi-rails/validators/bank_account_validator.rb

@@ -6,10 +6,7 @@ class BankAccountValidator < ActiveModel::Validator
     def validate(record)
       account_number  = record.send(:"#{options[:account_number_field]}")
       bank_code       = record.send(:"#{options[:bank_code_field]}")
-      account_number_changed = record.send( change_method(record, options[:account_number_field]) )
-      bank_code_changed      = record.send( change_method(record, options[:bank_code_field]) )
-      return true unless account_number_changed || bank_code_changed
-      return true if options[:allow_nil] && (account_number.nil? || bank_code.nil?)
+      return true if stop?(record, account_number, bank_code, options)
       record.errors.add(:"#{options[:account_number_field]}", :invalid) unless KontoAPI::valid?( :ktn => account_number, :blz => bank_code )
     rescue Timeout::Error => ex
       case options[:on_timeout]
@@ -28,5 +25,12 @@ def change_method(record, field)
       end
     end
 
+    def stop?(record, account_number, bank_code, options)
+      account_number_changed = record.send( change_method(record, options[:account_number_field]) )
+      bank_code_changed      = record.send( change_method(record, options[:bank_code_field]) )
+      return true unless account_number_changed || bank_code_changed
+      return true if options[:allow_nil] && (account_number.nil? || bank_code.nil?)
+    end
+
   end
 end