Error executing template "/Designs/Swift/Paragraph/Custom_GetAvailableStock.cshtml"
System.Exception: Product id is required to find a product.
   at Dynamicweb.Core.Ensure.That[TException](Boolean condition, String message)
   at Dynamicweb.Core.Ensure.That(Boolean condition, String message)
   at Dynamicweb.Core.Ensure.NotNullOrEmpty(String value, String message)
   at Dynamicweb.Ecommerce.ProductCatalog.ViewModelFactory.CreateView(ProductViewModelSettings settings, String productId, String variantId, String groupId)
   at Dynamicweb.Ecommerce.ProductCatalog.ViewModelFactory.CreateView(ProductViewModelSettings settings, String productId, String variantId)
   at CompiledRazorTemplates.Dynamic.RazorEngine_a72a4228dd104a27b58a286b7563b62b.ExecuteAsync()
   at RazorEngine.Templating.TemplateBase.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineCore.RunTemplate(ICompiledTemplate template, TextWriter writer, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineService.RunCompile(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.DynamicWrapperService.RunCompile(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.RunCompile(IRazorEngineService service, String name, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass16_0.<RunCompile>b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   at RazorEngine.Templating.RazorEngineServiceExtensions.RunCompile(IRazorEngineService service, String name, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.RunCompile(IRazorEngineService service, String templateSource, String name, Type modelType, Object model, DynamicViewBag viewBag)
   at Dynamicweb.Rendering.RazorTemplateRenderingProvider.Render(Template template)
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template)
   at Dynamicweb.Rendering.Template.RenderRazorTemplate()


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
  2     @using Dynamicweb.Ecommerce.ProductCatalog
  3     @using Dynamicweb.Ecommerce.Orders
  4     
  5     @functions{
  6         public class AvailStock
  7         {
  8             public double MaxQty { get; set; }
  9         }
 10     }
 11     
 12     @{
 13         string productId = Dynamicweb.Context.Current.Request.QueryString.Get("ProductId");
 14         string variantId = Dynamicweb.Context.Current.Request.QueryString.Get("VariantId");
 15         AvailStock availStock = new AvailStock();
 16     
 17         ProductViewModelSettings productSetting = new ProductViewModelSettings
 18         {
 19             LanguageId = Dynamicweb.Ecommerce.Common.Context.LanguageID,
 20             CurrencyCode = Dynamicweb.Ecommerce.Common.Context.Currency.Code,
 21             CountryCode = Dynamicweb.Ecommerce.Common.Context.Country.Code2,
 22             ShopId = Pageview.Area.EcomShopId
 23         };
 24         ProductViewModel product = ViewModelFactory.CreateView(productSetting,productId,variantId);
 25         if(product != null){
 26             double totalstock = 0;
 27             if (product.ProductType == Dynamicweb.Ecommerce.Products.ProductType.Stock && !product.NeverOutOfstock){
 28                 totalstock = product.StockLevel ?? 0;
 29             }
 30             if(product.NeverOutOfstock){
 31                 totalstock= 999999;
 32             }
 33             double cartqty = 0;
 34     		if (Dynamicweb.Ecommerce.Common.Context.Cart != null)
 35     		{
 36     			Order dworder = Dynamicweb.Ecommerce.Common.Context.Cart;
 37     			foreach(OrderLine orderLine in dworder.OrderLines.Where(x=>x.ProductId==productId))
 38     			{
 39     				cartqty = cartqty + orderLine.Quantity;
 40     			}
 41     		}
 42             totalstock=totalstock-cartqty;
 43             if(totalstock > 0){
 44                 availStock.MaxQty=totalstock;
 45             }
 46             else{
 47                 availStock.MaxQty=0;
 48             }
 49         }
 50         
 51         var ret = Newtonsoft.Json.JsonConvert.SerializeObject(availStock);
 52     }
 53     @ret