diff options
Diffstat (limited to 'app')
| -rw-r--r-- | app/models/product_cart.rb | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/app/models/product_cart.rb b/app/models/product_cart.rb index eb9cf9f..09e7a25 100644 --- a/app/models/product_cart.rb +++ b/app/models/product_cart.rb @@ -10,7 +10,7 @@ class ProductCart < ApplicationRecord validate :sole_product_in_cart def sole_product_in_cart - return if cart.products.find_by(id: product_id).nil? + return if cart.nil? || cart.products.find_by(id: product_id).nil? errors.add(:product_id, "cart already has product with id #{product_id}") end |