Updating ASPNetUsers primary key data type from nvarchar to bigint using code first migration in .Ne-CodePudding

Here's my ApplicationDbContext.cs code that adds other fields to ASPNetUsers table. I noticed that the Identity generated tables in the database set the primary key, Id, as nvarchar (450). How will I change ASPNetUsers' Id to bigint (Int64) via code first migration approach?

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)
    {
    }
}

CodePudding user response：

I saw a video on YouTube related to EF Core Migrations and was able to apply it in my codes.

1 - I changed ApplicationUser class in ApplicationDbContext.cs from ApplicationUser : IdentityUser to ApplicationUser : IdentityUser<Int64> so that PK will update to bigint in database. You can set it to int if you want the PK to be int only in database.

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 - I added ApplicationRole class in ApplicationDbContext.cs that inherits IdentityRole. Left it empty

public class ApplicationRole : IdentityRole<Int64>
{
}

3 - I changed the IdentityDbContext class in ApplicationDbContext.cs from IdentityDbContext<ApplicationUser> to IdentityDbContext<ApplicationUser,ApplicationRole, Int64>

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

Here's the whole code of ApplicationDbContext.cs:

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)
    {
    }
}

CodePudding user response：

Why don't you override it with the new keyword. I'm not sure if it will work, but I assume EF Core will use the new ID as the primary key

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

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