Data loader sample

import DataLoader from 'dataloader';

import InventoryItemService from './InventoryItemService';

const cache = String(process.env.CACHE).toLowerCase() === 'true';

const inventoryItemService = new InventoryItemService();

export const inventoryItem = new DataLoader(
  keys => Promise.all(keys.map(inventoryItemService.findById)),
  { cache },
);
export const inventoryItemEvents = new DataLoader(
  keys => Promise.all(keys.map(inventoryItemService.getEvents)),
  { cache },
);

export const nextAvailableInventoryItemNumbers = new DataLoader(
  keys =>
    Promise.all(
      keys.map(inventoryItemService.getNextAvailableInventoryItemNumbers),
    ),
  { cache },
);
export const nextAvailableInventoryItemNumber = new DataLoader(
  keys =>
    Promise.all(
      keys.map(
        inventoryItemService.getNextAvailableInventoryNumberByInventoryTypeId,
      ),
    ),
  { cache },
);