docs: improved commerce module docs [2/n] (#9501)

Improve + add docs for commerce modules from currency to inventory [2/n]
2024-10-09 09:53:17 +00:00
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+export const metadata = {
+  title: `Links between Inventory Module and Other Modules`,
+}
+
+# {metadata.title}
+
+This document showcases the module links defined between the Inventory Module and other commerce modules.
+
+## Product Module
+
+Each product variant has different inventory details. Medusa defines a link between the `ProductVariant` and `InventoryItem` data models.
+
+![A diagram showcasing an example of how data models from the Inventory and Product Module are linked.](https://res.cloudinary.com/dza7lstvk/image/upload/v1709658720/Medusa%20Resources/inventory-product_ejnray.jpg)
+
+A product variant whose `manage_inventory` property is enabled has an associated inventory item. Through that inventory's items relations in the Inventory Module, you can manage and check the variant's inventory quantity.