流畅的NHibernate - session.Delete（）不工作不抛出异常

Question

我正在使用Fluent NHibernate处理带有外键的基本CRUD。 每次我从视图中调用Delete();似乎代码执行成功。但是，它什么也没做。没有例外。

Delete()方法适用于Provider模型，但不适用于Product。

我的应用使用MVC 5.

型号：

Provider.cs：

 public class Provider
    {
        public virtual int Id { get; set; }
        public virtual string Name { get; set; }
        public virtual string Address { get; set; }
        public virtual string Phone { get; set; }
        public virtual string Email { get; set; }
        public virtual IList<Product> Products { get; set; }

        public Provider()
        {
            Products = new List<Product>();
        }
    }

Product.cs：

 public class Product
    {
        public virtual int Id { get; protected set; }
        public virtual string Name { get; set; }
        public virtual DateTime ManufacturingDate { get; set; }
        public virtual DateTime ExpirationDate { get; set; }
        public virtual double Weight { get; set; }
        public virtual double Price { get; set; }
        public virtual double NetProfit { get; set; }
        public virtual int Quantity { get; set; }
        public virtual Provider Provider { get; set; }
        public virtual IList<Detail> Details { get; set; }

        public Product()
        {
            Details = new List<Detail>();
        }
    }

映射：

ProviderMap.cs：

  public class ProviderMap : ClassMap<Provider>
    {
        public ProviderMap()
        {
            Id(x => x.Id, "id");
            Map(x => x.Name, "name");
            Map(x => x.Address, "address");
            Map(x => x.Phone, "phone");
            Map(x => x.Email, "email");
            HasMany(x => x.Products)
                .Inverse()
                .Cascade.Persist()
                .Not.LazyLoad();
        }
    }

ProductMap.cs：

 public class ProductMap : ClassMap<Product>
    {
        public ProductMap()
        {
            Id(x => x.Id, "id").GeneratedBy.Assigned();
            Map(x => x.Name, "name");
            Map(x => x.ManufacturingDate, "manufacturing_date");
            Map(x => x.ExpirationDate, "expiration_date");
            Map(x => x.Weight, "weight");
            Map(x => x.Price, "price");
            Map(x => x.NetProfit, "net_profit");
            Map(x => x.Quantity, "quantity");
            References(x => x.Provider, "provider_id").Not.LazyLoad();
            HasMany(x => x.Details)
                .Inverse()
                .Cascade.Persist()
                .Not.LazyLoad();
        }
    }

Delete（）方法：

public void Delete(T entity)
        {
            using (ISession session = NHibernateHelper.OpenSession())
            {
                using (ITransaction transaction = session.BeginTransaction())
                {
                    session.Delete(entity);
                    transaction.Commit();
                }
            }
        }

呼叫：

   // GET: Product/Delete/5
        public ActionResult Delete(int id)
        {
            var product = _productRepository.Find(id);
            return View(product);
        }

        // POST: Product/Delete/5
        [HttpPost]
        public ActionResult Delete(int id, Product product)
        {
            try
            {
                _productRepository.Delete(product);
                return RedirectToAction("Index");
            }
            catch(Exception e)
            {
                throw;
            }
        }