From 84a72718d2bdc5b370cf06536e3f494b6d0f90e8 Mon Sep 17 00:00:00 2001
From: ghoskin <gregphoskin@gmail.com>
Date: Fri, 28 May 2021 08:28:45 -0700
Subject: [PATCH] fix update cart item (#333)

Co-authored-by: Greg Hoskin <greghoskin@Gregs-MacBook-Pro.local>
---
 framework/swell/cart/use-update-item.tsx | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/framework/swell/cart/use-update-item.tsx b/framework/swell/cart/use-update-item.tsx
index e4261fc85..b1031b2e7 100644
--- a/framework/swell/cart/use-update-item.tsx
+++ b/framework/swell/cart/use-update-item.tsx
@@ -67,9 +67,10 @@ export const handler = {
 
     return useCallback(
       debounce(async (input: UpdateItemInput<T>) => {
-        const itemId = cartData.lineItems[0].id
-        const productId = cartData.lineItems[0].productId
-        const variantId = cartData.lineItems[0].variant.id
+        const firstLineItem = cartData.lineItems[0]
+        const itemId = item?.id || firstLineItem.id
+        const productId = item?.productId || firstLineItem.productId
+        const variantId = item?.variant.id || firstLineItem.variant.id
         if (!itemId || !productId) {
           throw new ValidationError({
             message: 'Invalid input used for this operation',