如何在Entity Framework核心标识中轻松将数据限制为仅登录用户

// 用户实体类
public class User
{
    public int Id { get; set; }
    public string Username { get; set; }
    public bool IsLoggedIn { get; set; }
    // 其他属性...
}

// 数据库上下文类
public class ApplicationDbContext : DbContext
{
    public DbSet<User> Users { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        // 配置用户实体类的映射关系
        modelBuilder.Entity<User>().ToTable("Users");
    }
}

// 数据查询示例
public class UserRepository
{
    private readonly ApplicationDbContext _context;

    public UserRepository(ApplicationDbContext context)
    {
        _context = context;
    }

    public List<User> GetLoggedInUsers()
    {
        return _context.Users.Where(u => u.IsLoggedIn).ToList();
    }
}