Question

我正在尝试在User和Request类之间创建多对多关系。迁移应该生成一个中间表，但它在两个表中生成一对多。

public class ApplicationUser : IdentityUser
{
    ...

    public virtual ICollection<Request> Requests{ get; set; }
}

public partial class Request
{
    ...

    public virtual ICollection<ApplicationUser> Users{ get; set; }
}

public partial class _12 : DbMigration
{
    public override void Up()
    {
        AddColumn("dbo.AspNetUsers", "Request_Id", c => c.Int());
        AddColumn("dbo.Requests", "ApplicationUser_Id", c => c.String(maxLength: 128));
        CreateIndex("dbo.AspNetUsers", "Request_Id");
        CreateIndex("dbo.Requests", "ApplicationUser_Id");
        AddForeignKey("dbo.AspNetUsers", "Request_Id", "dbo.Requests", "Id");
        AddForeignKey("dbo.Requests", "ApplicationUser_Id", "dbo.AspNetUsers", "Id");
    }
...
}

Answer 1

使用流畅的API工作。

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);            

    modelBuilder.Entity<ApplicationUser>()
                .HasMany(t => t.Requests)
                .WithMany(t => t.Users);    
}

给我这个

public partial class _12 : DbMigration
{
    public override void Up()
    {
        CreateTable(
            "dbo.ApplicationUserRequests",
            c => new
                {
                    ApplicationUser_Id = c.String(nullable: false, maxLength: 128),
                    Request_Id = c.Int(nullable: false),
                })
            .PrimaryKey(t => new { t.ApplicationUser_Id, t.Request_Id })
            .ForeignKey("dbo.AspNetUsers", t => t.ApplicationUser_Id, cascadeDelete: true)
            .ForeignKey("dbo.Requests", t => t.Request_Id, cascadeDelete: true)
            .Index(t => t.ApplicationUser_Id)
            .Index(t => t.Request_Id);

    }
    ...
}

我不必使用流畅的api表格，我自己添加了，但用户表格不同。

许多代码首先不在EF6中生成中间表

1 个答案: