protected bool LoadEntityDataBeforeSave(MappingForm model)
{
var product = _productService.FindSingle(new Specification <Product>(p => p.Sku == model.Sku));
if (product == null)
{
ModelState.AddModelError("Sku", "Sku not found");
return(false);
}
model.ProductId = product.Id;
return(true);
}