实体框架核心联接identity AspNetUser表。自定义表/实体的AspNetUser Id

public class CustomEntity
{
    public int Id { get; set; }
    public string AspNetUserId { get; set; }
    public AspNetUser AspNetUser { get; set; }
}

public class AspNetUser
{
    public string Id { get; set; }
    public string UserName { get; set; }
    // 其他属性...
}

public class ApplicationDbContext : DbContext
{
    public DbSet<CustomEntity> CustomEntities { get; set; }
    public DbSet<AspNetUser> AspNetUsers { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<CustomEntity>()
            .HasOne(c => c.AspNetUser)
            .WithOne()
            .HasForeignKey<CustomEntity>(c => c.AspNetUserId);
    }
}