在 ASP .NET Core MVC 应用程序中创建操作时出错

Question

我有一个包含两个实体的 ASP.NET Core MVC 应用程序：

Employee

和

Task

。这两个实体之间的关系是一对多的。

为员工存储的信息是全名、电子邮件、电话号码、出生日期和月薪。该任务由标题、描述、受让人（分配到该任务的员工）和截止日期组成。

当我要创建员工时，

ModelState

返回错误：

“需要任务”

因为那个错误，我无法创建员工。

[HttpPost]
public async Task<IActionResult> Create([Bind("FullName,Email,PhoneNumber,DateOfBirth,MonthlySalary")] Employee employee)
{
    if (ModelState.IsValid)
    {
        _context.Add(employee);
        await _context.SaveChangesAsync();
        return RedirectToAction(nameof(Index));
    }

    return View(employee);
}

public class Employee
{
    public int Id { get; set; }

    [Required(ErrorMessage = "Enter first and last name")]
    [StringLength(30, ErrorMessage = "Maximum 30 characters")]
    [Display(Name = "Full name")]
    public string FullName { get; set; }

    [Required(ErrorMessage = "Enter your email")]
    [EmailAddress(ErrorMessage = "Invalid Email address")]
    [Display(Name = "Email")]
    public string Email { get; set; }

    [Required(ErrorMessage = "Enter a phone number")]
    [StringLength(20, ErrorMessage = "Maximum 20 characters")]
    [Display(Name = "Phone number")]
    public string PhoneNumber { get; set; }

    [Required(ErrorMessage = "Enter date of birth")]
    [DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}")]
    [Display(Name = "Date of Birth")]
    public DateTime DateOfBirth { get; set; }

    [Required(ErrorMessage = "Enter the monthly salary")]
    [Range(30000,300000, ErrorMessage = "Salary must be in range [30000,300000]")]
    [Display(Name = "Monthly salary")]
    public int MonthlySalary { get; set; }

    public virtual ICollection<Task> Tasks { get; set; }
}

有人知道问题是什么吗？