Make ProductDetail non-essential and reusable

modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Application.Contracts/EasyAbp/EShop/Orders/Orders/Dtos/OrderLineDto.cs

@@ -15,7 +15,7 @@ namespace EasyAbp.EShop.Orders.Orders.Dtos
         
         public DateTime ProductModificationTime { get; set; }
         
-        public DateTime ProductDetailModificationTime { get; set; }
+        public DateTime? ProductDetailModificationTime { get; set; }
         
         public string ProductGroupName { get; set; }
         

modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Domain.Shared/EasyAbp/EShop/Orders/Orders/IOrderLine.cs

@@ -11,7 +11,7 @@ namespace EasyAbp.EShop.Orders.Orders
         
         DateTime ProductModificationTime { get; }
         
-        DateTime ProductDetailModificationTime { get; }
+        DateTime? ProductDetailModificationTime { get; }
         
         string ProductGroupName { get; }
         

modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Domain.Shared/EasyAbp/EShop/Orders/Orders/OrderLineEto.cs

@@ -14,7 +14,7 @@ namespace EasyAbp.EShop.Orders.Orders
         
         public DateTime ProductModificationTime { get; set; }
         
-        public DateTime ProductDetailModificationTime { get; set; }
+        public DateTime? ProductDetailModificationTime { get; set; }
         
         public string ProductGroupName { get; set; }
         

modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Domain/EasyAbp/EShop/Orders/Orders/OrderLine.cs

@@ -15,7 +15,7 @@ namespace EasyAbp.EShop.Orders.Orders
         
         public virtual DateTime ProductModificationTime { get; protected set; }
         
-        public virtual DateTime ProductDetailModificationTime { get; protected set; }
+        public virtual DateTime? ProductDetailModificationTime { get; protected set; }
 
         [NotNull]
         public virtual string ProductGroupName { get; protected set; }
@@ -69,7 +69,7 @@ namespace EasyAbp.EShop.Orders.Orders
             Guid productId,
             Guid productSkuId,
             DateTime productModificationTime,
-            DateTime productDetailModificationTime,
+            DateTime? productDetailModificationTime,
             [NotNull] string productGroupName,
             [NotNull] string productGroupDisplayName,
             [CanBeNull] string productUniqueName,

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/CreateUpdateProductDto.cs

@@ -18,7 +18,7 @@ namespace EasyAbp.EShop.Products.Products.Dtos
         public string ProductGroupName { get; set; }
         
         [DisplayName("ProductDetailId")]
-        public Guid ProductDetailId { get; set; }
+        public Guid? ProductDetailId { get; set; }
 
         [DisplayName("ProductCategory")]
         public ICollection<Guid> CategoryIds { get; set; }

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/ProductDto.cs

@@ -14,7 +14,7 @@ namespace EasyAbp.EShop.Products.Products.Dtos
         
         public string ProductGroupDisplayName { get; set; }
 
-        public Guid ProductDetailId { get; set; }
+        public Guid? ProductDetailId { get; set; }
 
         public string UniqueName { get; set; }
         

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/ProductViewDto.cs

@@ -11,7 +11,7 @@ namespace EasyAbp.EShop.Products.Products.Dtos
 
         public string ProductGroupName { get; set; }
 
-        public Guid ProductDetailId { get; set; }
+        public Guid? ProductDetailId { get; set; }
 
         public string UniqueName { get; set; }
 

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/cs.json

@@ -86,7 +86,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/en.json

@@ -87,7 +87,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/pl.json

@@ -86,7 +86,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/pt-BR.json

@@ -86,7 +86,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/sl.json

@@ -87,7 +87,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/tr.json

@@ -87,7 +87,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/vi.json

@@ -86,7 +86,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "The product unique name '{uniqueName}' is duplicated.",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "Inventory of product {productId} (SKU: {productSkuId}) cannot be changed by {changedInventory} from {originalInventory}",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "The specified product group ({productGroupName}) is nonexistent.",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "ProductDetail {productDetailId} has been used.",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "Sku code {code} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "Sku {serializedAttributeOptionIds} is duplicate for the product {productId}",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "You have no permission to get category list with hidden categories.",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/zh-Hans.json

@@ -84,7 +84,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "唯一的产品名称'{uniqueName}'重复",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "产品{productId} (SKU: {productSkuId})的库存不能由{originalInventory}中的{changedInventory}更改",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "指定的产品组({productGroupName})不存在",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "商品详情{productDetailId}已被使用",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "商品{productId}的Sku代码{code}重复",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "商品{productId}的Sku{serializedAttributeOptionIds}重复",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "您没有权限获取带有隐藏类别的类别列表",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Localization/Products/zh-Hant.json

@@ -84,7 +84,6 @@
     "EasyAbp.EShop.Products:DuplicatedProductUniqueName": "唯一的產品名稱'{uniqueName}'重復",
     "EasyAbp.EShop.Products:InventoryChangeFailed": "產品{productId} (SKU: {productSkuId})的庫存不能由{originalInventory}中的{changedInventory}更改",
     "EasyAbp.EShop.Products:NonexistentProductGroup": "指定的產品組({productGroupName})不存在",
-    "EasyAbp.EShop.Products:ProductDetailHasBeenUsed": "商品詳情{productDetailId}已被使用",
     "EasyAbp.EShop.Products:ProductSkuCodeDuplicated": "商品{productId}的Sku代碼{code}重復",
     "EasyAbp.EShop.Products:ProductSkuDuplicated": "商品{productId}的Sku{serializedAttributeOptionIds}重復",
     "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden": "您沒有權限獲取帶有隱藏類別的類別列表",

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Products/IProduct.cs

@@ -8,7 +8,7 @@ namespace EasyAbp.EShop.Products.Products
     {
         string ProductGroupName { get; }
         
-        Guid ProductDetailId { get; }
+        Guid? ProductDetailId { get; }
 
         string UniqueName { get; }
 

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Products/ProductEto.cs

@@ -16,7 +16,7 @@ namespace EasyAbp.EShop.Products.Products
 
         public string ProductGroupName { get; set; }
         
-        public Guid ProductDetailId { get; set; }
+        public Guid? ProductDetailId { get; set; }
 
         public string UniqueName { get; set; }
 

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/ProductsErrorCodes.cs

@@ -6,7 +6,6 @@
         public const string DuplicatedProductUniqueName = "EasyAbp.EShop.Products:DuplicatedProductUniqueName";
         public const string InventoryChangeFailed = "EasyAbp.EShop.Products:InventoryChangeFailed";
         public const string NonexistentProductGroup = "EasyAbp.EShop.Products:NonexistentProductGroup";
-        public const string ProductDetailHasBeenUsed = "EasyAbp.EShop.Products:ProductDetailHasBeenUsed";
         public const string ProductSkuCodeDuplicated = "EasyAbp.EShop.Products:ProductSkuCodeDuplicated";
         public const string ProductSkuDuplicated = "EasyAbp.EShop.Products:ProductSkuDuplicated";
         public const string NotAllowedToGetCategoryListWithShowHidden = "EasyAbp.EShop.Products:NotAllowedToGetCategoryListWithShowHidden";

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/Product.cs

@@ -15,7 +15,7 @@ namespace EasyAbp.EShop.Products.Products
         [NotNull]
         public virtual string ProductGroupName { get; protected set; }
         
-        public virtual Guid ProductDetailId { get; protected set; }
+        public virtual Guid? ProductDetailId { get; protected set; }
 
         [CanBeNull]
         public virtual string UniqueName { get; protected set; }
@@ -51,7 +51,7 @@ namespace EasyAbp.EShop.Products.Products
             Guid? tenantId,
             Guid storeId,
             [NotNull] string productGroupName,
-            Guid productDetailId,
+            Guid? productDetailId,
             [CanBeNull] string uniqueName,
             [NotNull] string displayName,
             InventoryStrategy inventoryStrategy,

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/ProductDetailHasBeenUsedException.cs

@@ -1,13 +0,0 @@
-using System;
-using Volo.Abp;
-
-namespace EasyAbp.EShop.Products.Products
-{
-    public class ProductDetailHasBeenUsedException : BusinessException
-    {
-        public ProductDetailHasBeenUsedException(Guid productDetailId) : base(ProductsErrorCodes.ProductDetailHasBeenUsed)
-        {
-            WithData(nameof(productDetailId), productDetailId);
-        }
-    }
-}

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/ProductManager.cs

@@ -4,7 +4,9 @@ using System.Linq;
 using System.Threading.Tasks;
 using EasyAbp.EShop.Products.Options.ProductGroups;
 using EasyAbp.EShop.Products.ProductCategories;
+using EasyAbp.EShop.Products.ProductDetails;
 using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp.Domain.Entities;
 using Volo.Abp.Domain.Services;
 using Volo.Abp.Uow;
 
@@ -14,6 +16,7 @@ namespace EasyAbp.EShop.Products.Products
     {
         private readonly IProductRepository _productRepository;
         private readonly IProductPriceProvider _productPriceProvider;
+        private readonly IProductDetailRepository _productDetailRepository;
         private readonly IProductCategoryRepository _productCategoryRepository;
         private readonly IProductInventoryProvider _productInventoryProvider;
         private readonly IProductGroupConfigurationProvider _productGroupConfigurationProvider;
@@ -21,12 +24,14 @@ namespace EasyAbp.EShop.Products.Products
         public ProductManager(
             IProductRepository productRepository,
             IProductPriceProvider productPriceProvider,
+            IProductDetailRepository productDetailRepository,
             IProductCategoryRepository productCategoryRepository,
             IProductInventoryProvider productInventoryProvider,
             IProductGroupConfigurationProvider productGroupConfigurationProvider)
         {
             _productRepository = productRepository;
             _productPriceProvider = productPriceProvider;
+            _productDetailRepository = productDetailRepository;
             _productCategoryRepository = productCategoryRepository;
             _productInventoryProvider = productInventoryProvider;
             _productGroupConfigurationProvider = productGroupConfigurationProvider;
@@ -43,7 +48,7 @@ namespace EasyAbp.EShop.Products.Products
 
             await _productRepository.InsertAsync(product, autoSave: true);
 
-            await CheckProductDetailAvailableAsync(product.Id, product.ProductDetailId);
+            await CheckProductDetailAsync(product);
 
             await UpdateProductCategoriesAsync(product.Id, categoryIds);
 
@@ -69,7 +74,7 @@ namespace EasyAbp.EShop.Products.Products
 
             await _productRepository.UpdateAsync(product, autoSave: true);
 
-            await CheckProductDetailAvailableAsync(product.Id, product.ProductDetailId);
+            await CheckProductDetailAsync(product);
 
             await UpdateProductCategoriesAsync(product.Id, categoryIds);
 
@@ -157,17 +162,27 @@ namespace EasyAbp.EShop.Products.Products
             await _productRepository.CheckUniqueNameAsync(product);
         }
         
+        protected virtual async Task CheckProductDetailAsync(Product product)
+        {
+            if (product.ProductDetailId.HasValue)
+            {
+                await CheckProductDetailExistAsync(product.ProductDetailId.Value, product.StoreId);
+            }
+            
+            foreach (var sku in product.ProductSkus.Where(x => x.ProductDetailId.HasValue))
+            {
+                await CheckProductDetailExistAsync(sku.ProductDetailId!.Value, product.StoreId);
+            }
+        }
+        
         [UnitOfWork]
-        protected virtual async Task CheckProductDetailAvailableAsync(Guid currentProductId, Guid desiredProductDetailId)
+        protected virtual async Task CheckProductDetailExistAsync(Guid productDetailId, Guid storeId)
         {
-            var otherOwner = await _productRepository.FindAsync(x =>
-                x.ProductDetailId == desiredProductDetailId && x.Id != currentProductId);
+            var productDetail = await _productDetailRepository.GetAsync(productDetailId);
 
-            // Todo: should also check ProductSku owner
-            
-            if (otherOwner != null)
+            if (productDetail.StoreId.HasValue && productDetail.StoreId.Value != storeId)
             {
-                throw new ProductDetailHasBeenUsedException(desiredProductDetailId);
+                throw new EntityNotFoundException(typeof(ProductDetail), productDetailId);
             }
         }
         

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/ProductView.cs

@@ -14,7 +14,7 @@ namespace EasyAbp.EShop.Products.Products
 
         public virtual string ProductGroupName { get; protected set; }
 
-        public virtual Guid ProductDetailId { get; protected set; }
+        public virtual Guid? ProductDetailId { get; protected set; }
 
         public virtual string UniqueName { get; protected set; }
 
@@ -51,7 +51,7 @@ namespace EasyAbp.EShop.Products.Products
             Guid? tenantId,
             Guid storeId,
             string productGroupName,
-            Guid productDetailId,
+            Guid? productDetailId,
             string uniqueName,
             string displayName,
             InventoryStrategy inventoryStrategy,

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/CreateModal.cshtml.cs

@@ -73,15 +73,18 @@ namespace EasyAbp.EShop.Products.Web.Pages.EShop.Products.Products.Product
 
         public virtual async Task<IActionResult> OnPostAsync()
         {
-            var detail = await _productDetailAppService.CreateAsync(
-                ObjectMapper
-                    .Map<CreateEditProductDetailViewModel, CreateUpdateProductDetailDto>(Product.ProductDetail));
-
             var createDto = ObjectMapper.Map<CreateEditProductViewModel, CreateUpdateProductDto>(Product);
 
-            createDto.ProductDetailId = detail.Id;
+            if (Product.ProductDetail.HasContent())
+            {
+                var detail = await _productDetailAppService.CreateAsync(
+                    ObjectMapper
+                        .Map<CreateEditProductDetailViewModel, CreateUpdateProductDetailDto>(Product.ProductDetail));
+
+                createDto.ProductDetailId = detail.Id;
+            }
 
-            var product = await _service.CreateAsync(createDto);
+            await _service.CreateAsync(createDto);
 
             return NoContent();
         }

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/EditModal.cshtml.cs

@@ -59,8 +59,6 @@ namespace EasyAbp.EShop.Products.Web.Pages.EShop.Products.Products.Product
                 .Select(dto => new SelectListItem(dto.DisplayName, dto.Id.ToString())).ToList();
 
             var productDto = await _service.GetAsync(Id);
-
-            var detailDto = await _productDetailAppService.GetAsync(productDto.ProductDetailId);
             
             Product = ObjectMapper.Map<ProductDto, CreateEditProductViewModel>(productDto);
 
@@ -70,26 +68,51 @@ namespace EasyAbp.EShop.Products.Web.Pages.EShop.Products.Products.Product
                 MaxResultCount = LimitedResultRequestDto.MaxMaxResultCount
             })).Items.Select(x => x.CategoryId).ToList();
 
-            Product.ProductDetail = new CreateEditProductDetailViewModel
+            if (productDto.ProductDetailId.HasValue)
             {
-                StoreId = detailDto.StoreId,
-                Description = detailDto.Description
-            };
+                var detailDto = await _productDetailAppService.GetAsync(productDto.ProductDetailId.Value);
+
+                Product.ProductDetail = new CreateEditProductDetailViewModel
+                {
+                    StoreId = detailDto.StoreId,
+                    Description = detailDto.Description
+                };
+            }
         }
 
         public virtual async Task<IActionResult> OnPostAsync()
         {
-            var product = await _service.GetAsync(Id);
+            var originalProduct = await _service.GetAsync(Id);
 
-            var detail = await _productDetailAppService.GetAsync(product.ProductDetailId);
+            var updateProductDto = ObjectMapper.Map<CreateEditProductViewModel, CreateUpdateProductDto>(Product);
 
-            await _productDetailAppService.UpdateAsync(detail.Id,
-                ObjectMapper
-                    .Map<CreateEditProductDetailViewModel, CreateUpdateProductDetailDto>(Product.ProductDetail));
+            if (Product.ProductDetail.HasContent())
+            {
+                if (originalProduct.ProductDetailId.HasValue)
+                {
+                    var detail = await _productDetailAppService.GetAsync(originalProduct.ProductDetailId.Value);
 
-            var updateProductDto = ObjectMapper.Map<CreateEditProductViewModel, CreateUpdateProductDto>(Product);
+                    await _productDetailAppService.UpdateAsync(detail.Id,
+                        ObjectMapper.Map<CreateEditProductDetailViewModel, CreateUpdateProductDetailDto>(
+                            Product.ProductDetail));
+                    
+                    updateProductDto.ProductDetailId = detail.Id;
+                }
+                else
+                {
+                    var detail = await _productDetailAppService.CreateAsync(
+                        ObjectMapper.Map<CreateEditProductDetailViewModel, CreateUpdateProductDetailDto>(
+                            Product.ProductDetail));
 
-            updateProductDto.ProductDetailId = detail.Id;
+                    updateProductDto.ProductDetailId = detail.Id;
+                }
+            }
+            else if (originalProduct.ProductDetailId.HasValue)
+            {
+                await _productDetailAppService.DeleteAsync(originalProduct.ProductDetailId.Value);
+                
+                updateProductDto.ProductDetailId = null;
+            }
             
             await _service.UpdateAsync(Id, updateProductDto);
             return NoContent();

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/ViewModels/CreateEditProductDetailViewModel.cs

@@ -18,5 +18,10 @@ namespace EasyAbp.EShop.Products.Web.Pages.EShop.Products.Products.Product.ViewM
         [TextArea(Rows = 4)]
         [Display(Name = "ProductDetailDescription")]
         public string Description { get; set; }
+
+        public bool HasContent()
+        {
+            return !Description.IsNullOrEmpty();
+        }
     }
 }

modules/EasyAbp.EShop.Products/test/EasyAbp.EShop.Products.Domain.Tests/Products/ProductDomainTests.cs

@@ -1,4 +1,7 @@
+using System;
+using System.Linq;
 using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
 using Shouldly;
 using Xunit;
 
@@ -6,18 +9,117 @@ namespace EasyAbp.EShop.Products.Products
 {
     public class ProductDomainTests : ProductsDomainTestBase
     {
+        private IProductRepository ProductRepository { get; }
+        private IProductManager ProductManager { get; }
+
         public ProductDomainTests()
         {
+            ProductRepository = ServiceProvider.GetRequiredService<IProductRepository>();
+            ProductManager = ServiceProvider.GetRequiredService<IProductManager>();
+        }
+
+        [Fact]
+        public async Task Should_Set_ProductDetailId()
+        {
+            var product2 = new Product(ProductsTestData.Product2Id, null, ProductsTestData.Store1Id, "Default",
+                ProductsTestData.ProductDetails2Id, "Ball", "Ball", InventoryStrategy.NoNeed, true, false, false, null,
+                null, 0);
+
+            await ProductManager.CreateAsync(product2);
+
+            product2 = await ProductRepository.GetAsync(product2.Id);
+            
+            product2.ProductDetailId.ShouldBe(ProductsTestData.ProductDetails2Id);
+        }
+
+        [Fact]
+        public async Task Should_Set_Sku_ProductDetailId()
+        {
+            await WithUnitOfWorkAsync(async () =>
+            {
+                var product1 = await ProductRepository.GetAsync(ProductsTestData.Product1Id);
+                var sku1 = product1.ProductSkus.Single(x => x.Id == ProductsTestData.Product1Sku1Id);
+            
+                sku1.ProductDetailId.ShouldBeNull();
+            
+                typeof(ProductSku).GetProperty(nameof(ProductSku.ProductDetailId))!.SetValue(sku1,
+                    ProductsTestData.ProductDetails1Id);
+
+                await ProductManager.UpdateAsync(product1);
+
+                product1 = await ProductRepository.GetAsync(product1.Id);
+                sku1 = product1.ProductSkus.Single(x => x.Id == ProductsTestData.Product1Sku1Id);
+
+                sku1.ProductDetailId.ShouldBe(ProductsTestData.ProductDetails1Id);
+            });
         }
 
         [Fact]
-        public async Task Test1()
+        public async Task Should_Reuse_ProductDetail()
         {
-            // Arrange
+            var product1 = await ProductRepository.GetAsync(ProductsTestData.Product1Id);
+
+            product1.ProductDetailId.ShouldBe(ProductsTestData.ProductDetails1Id);
+
+            var product2 = new Product(ProductsTestData.Product2Id, null, ProductsTestData.Store1Id, "Default",
+                ProductsTestData.ProductDetails2Id, "Ball", "Ball", InventoryStrategy.NoNeed, true, false, false, null,
+                null, 0);
+
+            await ProductManager.CreateAsync(product2);
+
+            product2 = await ProductRepository.GetAsync(product2.Id);
+            
+            product2.ProductDetailId.ShouldBe(ProductsTestData.ProductDetails2Id);
+
+            typeof(Product).GetProperty(nameof(Product.ProductDetailId))!.SetValue(product2,
+                ProductsTestData.ProductDetails1Id);
+            
+            await ProductManager.UpdateAsync(product2);
+            
+            product2 = await ProductRepository.GetAsync(product2.Id);
+
+            product2.ProductDetailId.ShouldBe(ProductsTestData.ProductDetails1Id);
+        }
+
+        [Fact]
+        public async Task Should_Remove_ProductDetailId()
+        {
+            await Should_Set_ProductDetailId();
+            
+            var product2 = await ProductRepository.GetAsync(ProductsTestData.Product2Id);
+
+            product2.ProductDetailId.ShouldNotBeNull();
+            
+            typeof(Product).GetProperty(nameof(Product.ProductDetailId))!.SetValue(product2, null);
+
+            await ProductManager.UpdateAsync(product2);
+
+            product2 = await ProductRepository.GetAsync(product2.Id);
+            
+            product2.ProductDetailId.ShouldBeNull();
+        }
+
+        [Fact]
+        public async Task Should_Remove_Sku_ProductDetailId()
+        {
+            await WithUnitOfWorkAsync(async () =>
+            {
+                await Should_Set_Sku_ProductDetailId();
+
+                var product1 = await ProductRepository.GetAsync(ProductsTestData.Product1Id);
+                var sku1 = product1.ProductSkus.Single(x => x.Id == ProductsTestData.Product1Sku1Id);
+
+                sku1.ProductDetailId.ShouldNotBeNull();
+
+                typeof(ProductSku).GetProperty(nameof(Product.ProductDetailId))!.SetValue(sku1, null);
+
+                await ProductManager.UpdateAsync(product1);
 
-            // Assert
+                product1 = await ProductRepository.GetAsync(product1.Id);
+                sku1 = product1.ProductSkus.Single(x => x.Id == ProductsTestData.Product1Sku1Id);
 
-            // Assert
+                sku1.ProductDetailId.ShouldBeNull();
+            });
         }
     }
 }

modules/EasyAbp.EShop.Products/test/EasyAbp.EShop.Products.TestBase/ProductsTestData.cs

@@ -12,6 +12,8 @@ namespace EasyAbp.EShop.Products
         
         public static Guid Product1Id { get; } = Guid.NewGuid();
         
+        public static Guid Product2Id { get; } = Guid.NewGuid();
+        
         public static Guid Product1Attribute1Id { get; } = Guid.NewGuid();
         
         public static Guid Product1Attribute1Option1Id { get; } = Guid.NewGuid();

samples/EShopSample/aspnet-core/src/EShopSample.EntityFrameworkCore/Migrations/20220411111127_MadeProductDetailIdNullable.cs

@@ -0,0 +1,70 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace EShopSample.Migrations
+{
+    public partial class MadeProductDetailIdNullable : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<Guid>(
+                name: "ProductDetailId",
+                table: "EasyAbpEShopProductsProductViews",
+                type: "uniqueidentifier",
+                nullable: true,
+                oldClrType: typeof(Guid),
+                oldType: "uniqueidentifier");
+
+            migrationBuilder.AlterColumn<Guid>(
+                name: "ProductDetailId",
+                table: "EasyAbpEShopProductsProducts",
+                type: "uniqueidentifier",
+                nullable: true,
+                oldClrType: typeof(Guid),
+                oldType: "uniqueidentifier");
+
+            migrationBuilder.AlterColumn<DateTime>(
+                name: "ProductDetailModificationTime",
+                table: "EasyAbpEShopOrdersOrderLines",
+                type: "datetime2",
+                nullable: true,
+                oldClrType: typeof(DateTime),
+                oldType: "datetime2");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<Guid>(
+                name: "ProductDetailId",
+                table: "EasyAbpEShopProductsProductViews",
+                type: "uniqueidentifier",
+                nullable: false,
+                defaultValue: new Guid("00000000-0000-0000-0000-000000000000"),
+                oldClrType: typeof(Guid),
+                oldType: "uniqueidentifier",
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<Guid>(
+                name: "ProductDetailId",
+                table: "EasyAbpEShopProductsProducts",
+                type: "uniqueidentifier",
+                nullable: false,
+                defaultValue: new Guid("00000000-0000-0000-0000-000000000000"),
+                oldClrType: typeof(Guid),
+                oldType: "uniqueidentifier",
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<DateTime>(
+                name: "ProductDetailModificationTime",
+                table: "EasyAbpEShopOrdersOrderLines",
+                type: "datetime2",
+                nullable: false,
+                defaultValue: new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified),
+                oldClrType: typeof(DateTime),
+                oldType: "datetime2",
+                oldNullable: true);
+        }
+    }
+}

samples/EShopSample/aspnet-core/src/EShopSample.EntityFrameworkCore/Migrations/EShopSampleDbContextModelSnapshot.cs

@@ -19,7 +19,7 @@ namespace EShopSample.Migrations
 #pragma warning disable 612, 618
             modelBuilder
                 .HasAnnotation("_Abp_DatabaseProvider", EfCoreDatabaseProvider.SqlServer)
-                .HasAnnotation("ProductVersion", "6.0.2")
+                .HasAnnotation("ProductVersion", "6.0.3")
                 .HasAnnotation("Relational:MaxIdentifierLength", 128);
 
             SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder, 1L, 1);
@@ -214,7 +214,7 @@ namespace EShopSample.Migrations
                     b.Property<Guid?>("OrderId")
                         .HasColumnType("uniqueidentifier");
 
-                    b.Property<DateTime>("ProductDetailModificationTime")
+                    b.Property<DateTime?>("ProductDetailModificationTime")
                         .HasColumnType("datetime2");
 
                     b.Property<string>("ProductDisplayName")
@@ -1398,7 +1398,7 @@ namespace EShopSample.Migrations
                     b.Property<TimeSpan?>("PaymentExpireIn")
                         .HasColumnType("time");
 
-                    b.Property<Guid>("ProductDetailId")
+                    b.Property<Guid?>("ProductDetailId")
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<string>("ProductGroupName")
@@ -1670,7 +1670,7 @@ namespace EShopSample.Migrations
                     b.Property<decimal?>("MinimumPrice")
                         .HasColumnType("decimal(20,8)");
 
-                    b.Property<Guid>("ProductDetailId")
+                    b.Property<Guid?>("ProductDetailId")
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<string>("ProductGroupDisplayName")