Entity Framework 7 RC1 添加嵌套子实体导致映射错误

Question

通过 Entity Framework 7（候选版本 1）添加（中等）大量嵌套子实体会存储错误的实体->子实体映射。

重现问题的简化示例：

using (TestContext dbContext = new TestContext())
{
    var nums = Enumerable.Range(1, 40);

    var orders = nums.Select(s => new TestOrder()
    {
        name = s.ToString(),
        TestOrderItem = nums.Take(10).Select(o => new TestOrderItem()
        {
            name = (s*100 + o).ToString(),
            TestOrderPricing =
                new[] {new TestOrderPricing() {amount = (s*100 + o), PricingType = "Principal"}}.ToList()
        }).ToList()

    });


    dbContext.AddRange(orders);

    dbContext.SaveChanges();
}

执行后，所有关系都被存储 - 但大多数 TestPricing 实体引用了错误的 TestOrderItem 实体。

这是 Entity Framework RC1 的现有错误还是我的设置有误？

测试环境设置：

Visual Studio 2015
DNX 4.6
EF7 RC1

1) 数据库优先 - 创建 3 个表：

CREATE TABLE [dbo].[TestOrder](
    [OrderId] [int] IDENTITY(1,1) NOT NULL,
    [name] [varchar](100) NULL,
 CONSTRAINT [PK_Order] PRIMARY KEY CLUSTERED 
(
    [OrderId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[TestOrderItem](
    [OrderItemId] [int] IDENTITY(1,1) NOT NULL,
    [OrderId] [int] NOT NULL,
    [name] [varchar](100) NULL,
 CONSTRAINT [PK_OrderItem] PRIMARY KEY CLUSTERED 
(
    [OrderItemId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[TestOrderPricing](
    [OrderItemId] [int] NOT NULL,
    [PricingType] [varchar](20) NOT NULL,
    [amount] [decimal](18, 2) NULL,
 CONSTRAINT [PK_OrderPricing] PRIMARY KEY CLUSTERED 
(
    [OrderItemId] ASC,
    [PricingType] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]


ALTER TABLE [dbo].[TestOrderItem]  WITH CHECK ADD  CONSTRAINT [FK_OrderItem_Order] FOREIGN KEY([OrderId])
REFERENCES [dbo].[TestOrder] ([OrderId])
ON DELETE CASCADE

ALTER TABLE [dbo].[TestOrderItem] CHECK CONSTRAINT [FK_OrderItem_Order]

ALTER TABLE [dbo].[TestOrderPricing]  WITH CHECK ADD  CONSTRAINT [FK_OrderPricing_OrderItem] FOREIGN KEY([OrderItemId])
REFERENCES [dbo].[TestOrderItem] ([OrderItemId])
ON DELETE CASCADE

ALTER TABLE [dbo].[TestOrderPricing] CHECK CONSTRAINT [FK_OrderPricing_OrderItem]

2) 搭建模型

dnx ef dbcontext scaffold "Server=.;Database=Test;Trusted_Connection=True;" EntityFramework.MicrosoftSqlServer --outputDir Models

3) 运行例子

或下载包含映射的控制台应用程序：

https://onedrive.live.com/redir?resid=352A0129BF9CBD17%2134155

观察：

如果我不使用服务器端生成的身份密钥，则没有问题
添加 entity.Property(e => e.OrderItemId).UseSqlServerIdentityColumn()（不是由脚手架添加的）没有帮助
在每个子实体上设置对父实体的引用-属性没有帮助
添加较少的实体就没有问题

Answer 1

已在 RC1 中确认问题，已验证此问题已在工作代码库中修复，并且修复将在 RC2 中发布

Entity Framework 7 RC1 添加嵌套子实体导致映射错误

Entity Framework 7 RC1 adding nested child entities results in wrong mapping

entity-framework

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