为什么 Room 是删除项目而不是更新

如何解决为什么 Room 是删除项目而不是更新

我想用 Room 更新我的实体。 我使用了 Update 注释，但是当我将类传递给 update 方法时，该项目被删除而不是更新 这是我的更新代码：

        private void updateLocalProduct() {
            Product product = new Product();
            product.AddToCard = selectedProduct.AddToCard;
            product.CartItemCount = selectedProduct.CartItemCount;
            product.CreatorUserID = selectedProduct.CreatorUserID;
            product.QuantityPerUnit = selectedProduct.QuantityPerUnit;
            if (!EdDiscount.getText().toString().equals("")) {
                product.offPrice = Integer.parseInt(StringUtils.getNumberFromStringV3(EdDiscount.getText().toString()));
                product.Discontinued = Integer.parseInt(EdDiscount.getText().toString());
            }
            product.Price = Integer.parseInt(StringUtils.getNumberFromStringV3(EdProductPrice.getText().toString()));
            product.ProductType = selectedProduct.ProductType;
            product.LinkToInstagram = selectedProduct.LinkToInstagram;
            product.LinkOut = selectedProduct.LinkOut;
            product.id = selectedProduct.id;
            product.Deleted1 = selectedProduct.Deleted1;
            product.ChatWhitCreator = selectedProduct.ChatWhitCreator;
            product.ActiveSave = selectedProduct.ActiveSave;
            product.ActiveLike = selectedProduct.ActiveLike;
            product.ActiveComment = selectedProduct.ActiveComment;
            product.Category = EdCategory.getText().toString() + "." + EdProduct.getText().toString();
            product.Description = EdProductDescription.getText().toString();

            product.MinimumReorderQuantity = selectedProduct.MinimumReorderQuantity;
            product.ReorderLevel = Integer.parseInt(reOrder);
            product.SaveCount = selectedProduct.SaveCount;
            product.SellCount = selectedProduct.SellCount;
            product.SupplierID = selectedProduct.SupplierID;
            product.TargetLevel = selectedProduct.TargetLevel;
            product.Unit = UnitValue;
            product.Saveit = selectedProduct.Saveit;
            product.Likeit = selectedProduct.Likeit;
            product.LikeCount = selectedProduct.LikeCount;
            product.StandardCost = Integer.parseInt(StringUtils.getNumberFromStringV3(EdProductPrice.getText().toString()));
            product.CompanyName = selectedProduct.CompanyName;
            product.ProductID = selectedProduct.ProductID;
            product.Brand = selectedProduct.Brand;
            product.MainCategory = selectedProduct.MainCategory;
            product.IsParticular = cbStory.isChecked();
            product.IsBulletin = cbBulletin.isChecked();
            if (MainCategory != null && !MainCategory.equals(""))
                product.SubCat1 = MainCategory;
            else
                product.SubCat1 = EdCategory.getText().toString();
            if (SubCat1 != null && !SubCat1.equals(""))
                product.SubCat2 = SubCat1;
            else
                product.SubCat2 = EdProduct.getText().toString();

            product.Spare3 = selectedProduct.Spare3;
            product.Spare2 = selectedProduct.Spare2;
            product.Spare1 = selectedProduct.Spare1;
            product.ShowPrice = EdProductPrice.getText().toString();
            product.ShowoffPrice = EdDiscount.getText().toString();
            product.ShowStandardCost = EdProductPrice.getText().toString();
            product.CompanyID = selectedProduct.CompanyID;
            product.ViewedCount = selectedProduct.ViewedCount;
            product.UpdateDate = selectedProduct.UpdateDate;
            product.ProductName = EdProductName.getText().toString();
            dbViewModel.updateProduct(product);

            dbViewModel.deletePropertiesOneProduct(pid);


            for (int i = 0; i < mProperties.size(); i++) {
                Properties properties = new Properties();
                properties.ProductID = pid;
                properties.PropertiesGroup = "مشخصات اصلی";
                properties.PropertiesName = mProperties.get(i);
                properties.PropertiesValue = mPropertyValues.get(i);
                properties.UpdateTime = getCurrentDate();
                dbViewModel.insertProperties(properties);
            }


        }

        private String getCurrentDate() {
            Date c = Calendar.getInstance().getTime();
            

            SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy",Locale.getDefault());
            String formattedDate = df.format(c);
            return formattedDate;
        } 

这是 ViewModel 的代码：

public void updateProduct(Product product){
        repository.updateProduct(product);
    }

这是存储库的代码：

public void updateProduct(Product product) {
    localApi.updateProduct(product)
            .subscribeOn(Schedulers.io())
            .subscribe();
}

这是我的 DAO 代码：

@Update
Completable updateProduct(Product product);

我已经搜索了很多关于这个问题，但我找不到任何东西 为什么应用程序删除实体而不是更新？