diff --git a/app/services/cart_service.rb b/app/services/cart_service.rb
index c4f3b5a5c0..35dcb720f0 100644
--- a/app/services/cart_service.rb
+++ b/app/services/cart_service.rb
@@ -106,15 +106,13 @@ class CartService
   end
 
   def read_variants_hash(data)
-    variants_array = []
-    (data[:variants] || []).each do |variant_id, quantity|
-      if quantity.is_a?(ActionController::Parameters)
-        variants_array.push({ variant_id: variant_id, quantity: quantity[:quantity], max_quantity: quantity[:max_quantity] })
+    (data[:variants] || []).map do |variant_id, quantity|
+      if quantity.is_a?(Hash)
+        { variant_id: variant_id, quantity: quantity[:quantity], max_quantity: quantity[:max_quantity] }
       else
-        variants_array.push({ variant_id: variant_id, quantity: quantity })
+        { variant_id: variant_id, quantity: quantity }
       end
     end
-    variants_array
   end
 
   def cart_remove(variant_id)