Install Multi-Warehouse Modules

In this document, you’ll learn how to install multi-warehouse related modules using NPM in the Medusa backend.

You can also install these modules in any NPM project.

Inventory Module

Step 1: Install Inventory Module

To install the Inventory Module, run the following command in the root directory of the Medusa backend:

• npm
• Yarn
• pnpm

npm install @medusajs/inventory

yarn add @medusajs/inventory

pnpm add @medusajs/inventory

Step 2: Add Inventory Module to Configurations

In medusa-config.js, add the inventory module to the exported object under the modules property:

module.exports = {
  // ...
  modules: {
    // ...
    inventoryService: {
      resolve: "@medusajs/inventory",
    },
  },
}

Step 3: Run Migrations of Inventory Module

Run the following command to reflect schema changes into your database:

npx @medusajs/medusa-cli migrations run

Step 4: Run Migration Script

After installing the Stock Location module, make sure to run the migration script

---

Stock Location Module

Step 1: Install Stock Location Module

To install the Stock Location Module, run the following command in the root directory of the Medusa backend:

• npm
• Yarn
• pnpm

npm install @medusajs/stock-location

yarn add @medusajs/stock-location

pnpm add @medusajs/stock-location

Step 2: Add Stock Location Module to Configurations

In medusa-config.js, add the stock location module to the exported object under the modules property:

module.exports = {
  // ...
  modules: {
    // ...
    stockLocationService: {
      resolve: "@medusajs/stock-location",
    },
  },
}

Step 3: Run Migrations of Stock Location Module

Run the following command to reflect schema changes into your database:

npx @medusajs/medusa-cli migrations run

Step 4: Run Migration Script

After installing both modules, make sure to run the migration script

---

Run Migration Script

After installing both modules, run the following command to migrate current product variant information to fit the schema changes introduced by the modules:

node ./node_modules/@medusajs/medusa/dist/scripts/migrate-inventory-items.js

You can now start the Medusa backend and use the stock location module in your commerce application.