Fix self.inherited so the bahvior of subclasses of subclasses stays t…

…he same
celsodantas · Mar 23, 2014 · f3c7f18 · f3c7f18
1 parent 1d5eae2
commit f3c7f18
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/active_merchant/billing/integrations/helper.rb b/lib/active_merchant/billing/integrations/helper.rb
@@ -14,7 +14,7 @@ class Helper #:nodoc:
         self.application_id = 'ActiveMerchant'
 
         def self.inherited(subclass)
-          subclass.mappings = {}
+          subclass.mappings ||= {}
         end
 
         def initialize(order, account, options = {})