feat(admin-ui, medusa): Improve fulfillment validation (#3541)

* validate that an inventory level exists as well

* improve create-fulfillment handling in admin

* pass along location id rather than inventory level id

* add changeset

* remove dependency

packages/medusa/src/api/routes/admin/orders/create-fulfillment.ts

@@ -168,7 +168,11 @@ export const updateInventoryAndReservations = async (
         items.map(({ item, quantity }) => ({ ...item, quantity } as LineItem)),
         locationId
       )
+    })
+  )
 
+  await Promise.all(
+    fulfillments.map(async ({ items }) => {
       await Promise.all(
         items.map(async ({ item, quantity }) => {
           if (!item.variant_id) {

packages/medusa/src/services/product-variant-inventory.ts

@@ -514,12 +514,19 @@ class ProductVariantInventoryService extends TransactionBaseService {
     for (const item of itemsToValidate) {
       const pvInventoryItems = await this.listByVariant(item.variant_id!)
 
-      const [inventoryLevels] =
+      const [inventoryLevels, inventoryLevelCount] =
         await this.inventoryService_.listInventoryLevels({
           inventory_item_id: pvInventoryItems.map((i) => i.inventory_item_id),
           location_id: locationId,
         })
 
+      if (!inventoryLevelCount) {
+        throw new MedusaError(
+          MedusaError.Types.NOT_ALLOWED,
+          `Inventory item for ${item.title} not found at location`
+        )
+      }
+
       const pviMap: Map<string, ProductVariantInventoryItem> = new Map(
         pvInventoryItems.map((pvi) => [pvi.inventory_item_id, pvi])
       )