beforeOperation.ts

beforeOperation: async ({ resolvedData, item, context }) => {
  if (resolvedData?.products) {
    const dbItems = await context.query.Cart.findOne({
      where: { id: item ? (item.id as string) : '' },
      query: 'products { id }',
    });
    if (dbItems.products.length) {
      await context.query.CartProduct.deleteMany({
        where: dbItems.products.map((el: { id: string }) => ({
          id: el.id,
        })),
      });
    }
  }
},