添加嵌套子实体的实体框架7 RC1导致错误的映射

Question

通过Entity Framework 7（Release Candidate 1）添加（中）大量嵌套子实体存储了错误的实体 - ＆gt;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();
}

执行该操作后，将存储所有关系 - 但大多数TestPricing实体都引用了错误的TestOrderItem实体。

这是实体框架RC1的现有错误还是设置错误？

测试环境的设置：

• 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）支持模型

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

3）运行示例

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()（未通过脚手架添加）无效
• 在每个子实体上设置父实体的reference-property无效
• 添加更少的实体没有问题

Answer 1

RC1中的确认问题，已验证此问题已在工作代码库中修复，修复程序将在RC2中发布