Merge pull request #601 from paysavvy/fix/exception_in_rescue

Check method defined in rescue block, add fallback

Author: lgebhardt

lib/jsonapi/active_record_operations_processor.rb

@@ -18,17 +18,18 @@ def rollback
   # Catch errors that should be handled before JSONAPI::Exceptions::Error
   # and other unprocessed exceptions
   def process_operation(operation)
-    with_default_handling do 
+    with_default_handling do
       begin
         operation.apply
       rescue ActiveRecord::DeleteRestrictionError => e
         record_locked_error = JSONAPI::Exceptions::RecordLocked.new(e.message)
         return JSONAPI::ErrorsOperationResult.new(record_locked_error.errors[0].code, record_locked_error.errors)
 
       rescue ActiveRecord::RecordNotFound
-        record_not_found = JSONAPI::Exceptions::RecordNotFound.new(operation.associated_key)
+        key = operation.respond_to?(:associated_key) ? operation.associated_key : :unavailable
+        record_not_found = JSONAPI::Exceptions::RecordNotFound.new(key)
         return JSONAPI::ErrorsOperationResult.new(record_not_found.errors[0].code, record_not_found.errors)
       end
-    end  
+    end
   end
 end