private async Task CheckProductsAndPricesOf(IEnumerable <RentedProduct> rentedProductList)
{
Products = await Tenant.Products
.WhereIdIn(rentedProductList.Select(p => p.ProductId))
.WhereMarketed(true)
.IncludePrices()
.ToListAsync();
ProductPrices = Products.SelectMany(product => product.ProductPrices);
HasOneOrMoreProductsNotFound = rentedProductList.Count() != Products.Count();
HasOneOrMoreProductsNotMarketed = Products.Any(product => !product.Marketed);
HasOneOrMorePricesNotDefined = !ProductPrices.Any() ||
ProductPrices.Any(productPrice =>
productPrice == null ||
productPrice.UnitRentPrice == null);
}