Why should you care?

Mid-size manufacturers need one system linking stock levels to purchase orders and GL exports.

See it live — copy this example

Paste into your MeanVerse project (Angular + Express + MongoDB), then run with ng serve / node / mongosh as noted.

// meanverse-erp/
//   api/src/routes/inventory.routes.ts
//   web/src/app/features/erp/stock.service.ts

router.post('/inventory/adjust', auth, requirePermission('inventory:write'), async (req, res, next) => {
  try {
    const result = await inventoryService.adjustStock(req.tenantId, req.body);
    res.json(result);
  } catch (e) { next(e); }
});

@Injectable({ providedIn: 'root' })
export class StockService {
  private http = inject(HttpClient);
  levels(sku: string) {
    return this.http.get<StockLevel>(`/api/erp/inventory/${encodeURIComponent(sku)}`);
  }
  adjust(dto: StockAdjustDto) {
    return this.http.post<StockLevel>('/api/erp/inventory/adjust', dto);
  }
}

What happened?

• inventoryService writes StockMovement audit doc and updates SKU quantity atomically.
• StockService provides read and adjust for warehouse Angular UI.

Practice next

1. Modules: inventory, PO, vendors — separate route files.
2. Every stock change append-only movement log.
3. Angular low-stock alert widget using StockService.levels.
4. Link PO receipt to automatic stock increment.
5. Add barcode scan input component for warehouse.

Remember

ERP = integrated ops modules + audit trail. Stock adjust is transactional write. Feature folders mirror business domains.

Warehouse operator

Receiver scans PO; stock increments; finance sees accrual export.

Outcome: Single MeanVerse ERP replaces three spreadsheets.