How to Set ASP.NET Core Identity Role Automatically

Question

I want to make user login part in asp.net core project using identity package. it's work fine. What I would like to do in addition is to fix the roll. When I update the database after add-migration all the roles should be inserted in the database. If i do the following procedure and update the database after add-migration, the data is correctly inserted in the database, but when i try to register the user, it shows an error. System.InvalidOperationException: The entity type 'IdentityUserLogin' requires a primary key to be defined How can this be done, would be greatly appreciated if anyone could help. public class ApplactionDbcontext : IdentityDbContext { public ApplactionDbcontext(DbContextOptions options) : base(options) { }

public DbSet<Applactionuser> applactionusers { get; set; }
public DbSet<ApplactionUserRole> applactionUserRoles { get; set; }
protected override void OnModelCreating(ModelBuilder builder)
{
    builder.Entity<IdentityUser<String>>().HasNoKey();
    builder.Entity<IdentityUserLogin<String>>().HasNoKey();
    builder.Entity<IdentityUserRole<String>>().HasNoKey();
    builder.Entity<IdentityUserToken<String>>().HasNoKey();
    builder.Entity<IdentityRole>().HasData(
              new IdentityRole
              {Id= "247872d3-30ae-4078-8c7f-d8865607be5e",
                  Name = "Admin",
                  NormalizedName = "Admin"
              }
     );
}

}

Answer 1

If I understand correctly, you want to seeds roles in the AspNetRoles table. First, register the Role Manager in the Program.cs file. The Role Manager handles all details of adding a role to the AspNetRoles table. Program.cs

builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>();

Create a class that takes advantage of the Role Manager to seed the role data.

using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
namespace RazorPagesIdentity.Data
{
    public class SeedData
    {
        public static async Task InitializeAsync(IServiceProvider serviceProvider)
        {
            var _roleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
            if(_roleManager != null)
            {
                IdentityRole? role = await _roleManager.FindByNameAsync("Admin");
                if(role == null)
                {
                    var results = await _roleManager.CreateAsync(new IdentityRole("Admin"));
                }
            }
        }
    }
}

Update the Program.cs file to execute the InitializeAsync() method above. Place the code after the builder.build() line.

var app = builder.Build();
//Seed data
using (var scope = app.Services.CreateScope())
{
    var services = scope.ServiceProvider;
    await SeedData.InitializeAsync(services);
}

This is my DbContext file.

using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
namespace RazorPagesIdentity.Data
{
    public class ApplicationDbContext : IdentityDbContext
    {
        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
            : base(options)
        {
        }
    }
}

I want to make sure you understand that key are needs to relate the data.