使用 .Net Core (.Net 5) 中的代码优先迁移将 ASPNetUsers 主键数据类型从 nvarchar 更新为 bigint

Question

这是我的 ApplicationDbContext.cs 代码，用于将其他字段添加到 ASPNetUsers table。我注意到数据库中生成的身份 tables 将主键 Id 设置为 nvarchar (450)。如何通过代码优先迁移方法将 ASPNetUsers 的 ID 更改为 bigint (Int64)？

public class ApplicationUser : IdentityUser
{
    [Required]
    [StringLength(100)]
    public string FirstName { get; set; }
    [Required]
    [StringLength(100)]
    public string LastName { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(20)]
    public string SAPNo { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(150)]
    public string Position { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(150)]
    public string EmailAddress { get; set; }
    [Required]
    public Int64 DepartmentId { get; set; }
    [Required]
    public int LocationId { get; set; }
    [Required]
    public int RoleId { get; set; }
    [Column(TypeName = "VARCHAR")]
    [StringLength(20)]
    public string CreatedBy { get; set; }
    public string CreatedDate { get; set; }
    public bool IsActive { get; set; } = true;
}

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}

Answer 1

为什么不用 new 关键字覆盖它。我不确定它是否有效，但我假设 EF Core 将使用新 ID 作为主键

public class IdentityUser
{
     public string Id { get; set; }
}

public class ApplicationUser : IdentityUser 
{
      public new long Id { get; set; }
}

Answer 2

我在 YouTube 上看到了一个与 EF Core 迁移相关的视频，并且能够将其应用到我的代码中。

1 - 我将 ApplicationDbContext.cs 中的 ApplicationUser class 从 ApplicationUser : IdentityUser 更改为 ApplicationUser : IdentityUser<Int64> 以便 PK 将更新为数据库中的 bigint。如果您希望PK仅在数据库中为int，则可以将其设置为int。

public class ApplicationUser : IdentityUser<Int64>
{
    [Required]
    [StringLength(100)]
    public string FirstName { get; set; }
    [Required]
    [StringLength(100)]
    public string LastName { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(20)]
    public string SAPNo { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(150)]
    public string Position { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(150)]
    public string EmailAddress { get; set; }
    [Required]
    public Int64 DepartmentId { get; set; }
    [Required]
    public int LocationId { get; set; }
    [Required]
    public int RoleId { get; set; }
    [Column(TypeName = "VARCHAR")]
    [StringLength(20)]
    public string CreatedBy { get; set; }
    public string CreatedDate { get; set; }
    public bool IsActive { get; set; } = true;
}

2 - 我在继承 IdentityRole 的 ApplicationDbContext.cs 中添加了 ApplicationRole class。留空

public class ApplicationRole : IdentityRole<Int64>
{
}

3 - 我将 ApplicationDbContext.cs 中的 IdentityDbContext class 从 IdentityDbContext<ApplicationUser> 更改为 IdentityDbContext<ApplicationUser,ApplicationRole, Int64>

public class ApplicationDbContext : IdentityDbContext<ApplicationUser,ApplicationRole, Int64>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}

这是ApplicationDbContext.cs的全部代码：

public class ApplicationUser : IdentityUser<Int64>
{
    [Required]
    [StringLength(100)]
    public string FirstName { get; set; }
    [Required]
    [StringLength(100)]
    public string LastName { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(20)]
    public string SAPNo { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(150)]
    public string Position { get; set; }
    [Required]
    [Column(TypeName = "VARCHAR")]
    [StringLength(150)]
    public string EmailAddress { get; set; }
    [Required]
    public Int64 DepartmentId { get; set; }
    [Required]
    public int LocationId { get; set; }
    [Required]
    public int RoleId { get; set; }
    [Column(TypeName = "VARCHAR")]
    [StringLength(20)]
    public string CreatedBy { get; set; }
    public string CreatedDate { get; set; }
    public bool IsActive { get; set; } = true;
}

public class ApplicationRole : IdentityRole<Int64>
{
}

public class ApplicationDbContext : IdentityDbContext<ApplicationUser,ApplicationRole, Int64>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}

使用 .Net Core (.Net 5) 中的代码优先迁移将 ASPNetUsers 主键数据类型从 nvarchar 更新为 bigint

Updating ASPNetUsers primary key data type from nvarchar to bigint using code first migration in .Net Core (.Net 5)

asp.net-identity

asp.net-core-mvc

asp.net-core

asp.net-core-5.0