我正在尝试进行批量插入,但它不起作用。我以为我有这个工作,但似乎有些东西坏了,如果有人能告诉我什么,我会很感激。
编辑- 这是数据库架构:
CREATE TABLE [dbo].[Categories](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](100) NOT NULL,
CONSTRAINT [PK_Categories] PRIMARY KEY CLUSTERED ([Id])
)
CREATE TABLE [dbo].[ProductTopSellersCategory](
[ProductId] [int] NOT NULL,
[CategoryId] [int] NOT NULL,
[Order] [int] NOT NULL,
CONSTRAINT [PK_ProductTopSellersCategory]
PRIMARY KEY CLUSTERED ([ProductId], [CategoryId])
)
ALTER TABLE [dbo].[ProductTopSellersCategory] ADD
CONSTRAINT [FK_ProductTopSellersCategory_Products]
FOREIGN KEY ([ProductId]) REFERENCES [dbo].[Products] ([Id]),
CONSTRAINT [FK_ProductTopSellersCategory_Categories]
FOREIGN KEY ([CategoryId]) REFERENCES [dbo].[Categories] ([Id])
我有以下实体:
public class Category {
public virtual int Id { get; set; }
public virtual string Name { get; set; }
}
public class ProductTopSellerCategory {
public virtual ProductTopSellerCategoryIdentifier Id { get; set; }
private Product _product;
public virtual Product Product {
get { return _product; }
set { _product = value; Id.ProductId = _product.Id; }
}
private Category _category;
public virtual Category Category {
get { return _category; }
set { _category = value; Id.CategoryId = _category.Id; }
}
[Required]
public virtual int Order { get; set; }
public ProductTopSellerCategory() {
Id = new ProductTopSellerCategoryIdentifier();
}
}
[Serializable]
public class ProductTopSellerCategoryIdentifier {
public virtual int ProductId { get; set; }
public virtual int CategoryId { get; set; }
#region Composite Id Members
public override bool Equals(object obj) {
if (obj == null || !(obj is ProductTopSellerCategoryIdentifier))
return false;
var i = (ProductTopSellerCategoryIdentifier)obj;
return ProductId == i.ProductId && CategoryId == i.CategoryId;
}
public override int GetHashCode() {
return ToString().GetHashCode();
}
public override string ToString() {
return ProductId + "|" + CategoryId;
}
#endregion
}
使用相应的流畅映射:
public class CategoryMap : ClassMap<Category> {
public CategoryMap() {
Table("Categories");
Id(x => x.Id);
Map(x => x.Name);
}
}
public class ProductTopSellerCategoryMap : ClassMap<ProductTopSellerCategory> {
public ProductTopSellerCategoryMap() {
Table("ProductTopSellersCategory");
CompositeId(x => x.Id)
.KeyProperty(x => x.ProductId)
.KeyProperty(x => x.CategoryId);
References(x => x.Product).ReadOnly();
References(x => x.Category).ReadOnly();
Map(x => x.Order, "[Order]");
}
}
现在当我说:
var category = new Category() { Name = "Test 1" };
var product = session.Get<Product>(1);
var topSeller = new ProductTopSellerCategory() { Product = product, Category = category };
session.SaveOrUpdate(category);
session.SaveOrUpdate(topSeller);
session.Transaction.Commit();
它抛出错误:
INSERT 语句与 FOREIGN KEY 约束“FK_ProductTopSellersCategory_Categories”冲突。数据库“xxx”、表“dbo.Categories”、“Id”列中发生冲突。该语句已终止。
我试图尽可能地简化这个例子。我真的很感激帮助。谢谢