相关疑难解决方法(0)

我的项目中有一个模型如下:

public class Model 
{
    public int Id { get; set; }
    public long FromNo { get; set; }
    public long ToNo { get; set; }
    public string Content { get; set; }
    public long TicketNo { get; set; }
}

迁移如下

public override void Down()
{
    AlterColumn("dbo.Received", "FromNo", c => c.Long(nullable: false));
    AlterColumn("dbo.Received", "ToNo", c => c.Long(nullable: false));
    AlterColumn("dbo.Received", "TicketNo", c => c.Long(nullable: false));
}
public override void Up()
{
    AlterColumn("dbo.Received", "FromNo", c => c.String());
    AlterColumn("dbo.Received", "ToNo", c => …

我开始使用Entity Framework 4.3 Code First进行手动迁移和SQL Express 2008并最近更新到EF5(在VS 2010中),并注意到现在当我更改类似外键约束时,迁移代码会添加"dbo".到表名的开头,因此它构造的外键名称对于现有约束是不正确的(现在通常看起来很奇怪).

EF 4.3中的原始迁移脚本(注意ForeignKey("Products",t => t.Product_Id)):

    CreateTable(
        "Products",
        c => new
            {
                Id = c.Int(nullable: false, identity: true),
                ProductName = c.String(),
            })
        .PrimaryKey(t => t.Id);

    CreateTable(
        "KitComponents",
        c => new
            {
                Id = c.Int(nullable: false, identity: true),
                Component_Id = c.Int(),
                Product_Id = c.Int(),
            })
        .PrimaryKey(t => t.Id)
        .ForeignKey("Products", t => t.Component_Id)
        .ForeignKey("Products", t => t.Product_Id)
        .Index(t => t.Component_Id)
        .Index(t => t.Product_Id);

生成的外键名称:FK_KitComponents_Products_Product_Id FK_KitComponents_Products_Component_Id

如果我然后升级到EF5并更改外键,则迁移代码看起来像(注意"dbo.KitComponents"和"dbo.Products"而不是"KitComponents"和"Products"):

DropForeignKey("dbo.KitComponents", "Product_Id", "dbo.Products");
DropIndex("dbo.KitComponents", …