ef代码优先迁移,db生成的guid键

一行字的问题

如何让ef作为代码首次迁移的一部分生成

ALTER TABLE [DMS].[Forms] ADD  CONSTRAINT [DF_DMS.Forms_Id]  DEFAULT (newid()) FOR [Id]
GO

问题的更多细节

我将构建一个简单的表来存储有关表单的信息,因为碰巧我已经在我的数据库中为另一个表工作了,但是如果我向您展示代码(见下文),您会发现我遇到的问题比看起来更奇怪……

首先是工作示例实体:

[Table("Files", Schema = "DMS")]
public class File
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid Id { get; set; }
    ...
}

好吧,现在不工作的那个…

[Table("Forms", Schema = "CMS")]
public class Form
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid Id { get; set; }
    ...
}

如问题中所述,我首先使用ef代码,下面是迁移代码:

工作的那个:

CreateTable(
    "DMS.Files",
    c => new
        {
            Id = c.Guid(nullable: false),
            ...
        })
    .PrimaryKey(t => t.Id)
    ...;

…不工作的那个…

CreateTable(
    "CMS.Forms",
    c => new
        {
            Id = c.Guid(nullable: false),
            ...
        })
    .PrimaryKey(t => t.Id)
    ...;

所以一切都很好…然后我用“update database”命令迁移我的数据库,并编写这两个表的脚本…

工作的那个:

...
CREATE TABLE [DMS].[Files](
    [Id] [uniqueidentifier] NOT NULL,
    ...
 CONSTRAINT [PK_DMS.Files] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO

ALTER TABLE [DMS].[Files] ADD  CONSTRAINT [DF_DMS.Files_Id]  DEFAULT (newid()) FOR [Id]
GO
...

…不工作的那个…

...
CREATE TABLE [CMS].[Forms](
    [Id] [uniqueidentifier] NOT NULL,
    ...
 CONSTRAINT [PK_CMS.Forms] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO
...