feat(medusa): Cart and totals computational optimizations (#2475)

packages/medusa/src/api/routes/admin/draft-orders/get-draft-order.ts

@@ -71,9 +71,15 @@ export default async (req, res) => {
     relations: defaultAdminDraftOrdersRelations,
   })
 
-  draftOrder.cart = await cartService.retrieveWithTotals(draftOrder.cart_id, {
-    relations: defaultAdminDraftOrdersCartRelations,
-  })
+  draftOrder.cart = await cartService.retrieveWithTotals(
+    draftOrder.cart_id,
+    {
+      relations: defaultAdminDraftOrdersCartRelations,
+    },
+    {
+      force_taxes: true,
+    }
+  )
 
   res.json({ draft_order: draftOrder })
 }

packages/medusa/src/api/routes/admin/draft-orders/register-payment.ts

@@ -83,16 +83,7 @@ export default async (req, res) => {
 
     const cart = await cartService
       .withTransaction(manager)
-      .retrieve(draftOrder.cart_id, {
-        select: ["total"],
-        relations: [
-          "discounts",
-          "discounts.rule",
-          "shipping_methods",
-          "region",
-          "items",
-        ],
-      })
+      .retrieveWithTotals(draftOrder.cart_id)
 
     await paymentProviderService
       .withTransaction(manager)