Question

我已经向ApplicationUser添加了一些属性，其中两个是ICollection。当我使用Update-Database时，它不会为这两个成员生成列。

那么，我在这里错过了什么？我认为这是非常基本的。我以前在Java中使用Hibernate，它为元素集合生成一个新表。

一些代码示例 -

ApplicationUser

public class ApplicationUser : IdentityUser
{
    public string FirstName { get; set; }

    public string LastName { get; set; }

    public byte[] UserImage { get; set; }

    public virtual ICollection<string> Interests { get; set; }

    public virtual ICollection<string> Friends { get; set; }

}

RegisterViewModel

public class RegisterViewModel
{
    [Required]
    [Display(Name = "Username")]
    public string UserName { get; set; }

    [Required]
    [StringLength(25)]
    [Display(Name = "First Name")]
    public string FirstName { get; set; }

    [Required]
    [StringLength(25)]
    [Display(Name = "Last Name")]
    public string LastName { get; set; }

    [Display(Name = "User Image")]
    public int UserImage { get; set; }

    [Required]
    [Display(Name = "Interests")]
    public virtual ICollection<string> Interests { get; set; }

    [Display(Name = "Friends")]
    public virtual ICollection<string> Friends { get; set; }

    //........

任务注册（RegisterViewModel模型）

 public async Task<ActionResult> Register(RegisterViewModel model)
    {
        if (ModelState.IsValid)
        {
            var user = new ApplicationUser()
            {
                UserName = model.UserName,
                FirstName = model.FirstName,
                LastName = model.LastName,
                Interests = model.Interests,
                Friends = model.Friends
            };

            HttpPostedFileBase file = Request.Files["file"];
            byte[] imgBytes = null;

            BinaryReader reader = new BinaryReader(file.InputStream);
            imgBytes = reader.ReadBytes(file.ContentLength);

            user.UserImage = imgBytes;


            var result = await UserManager.CreateAsync(user, model.Password);
            if (result.Succeeded)
            //............

Answer 1

您需要为收藏品建模。你可以去多对多或一对多。

// many to many
public class Interest
{
    public int InterestId { get; set; }
    public string InterestDesc { get; set; } // field can't match class name
}

// one to many
public class Interest
{
    public int UserId { get; set; }  // Make primary key the FK into application user
    public string InterestDesc { get; set; } // field can't match class name
}

然后更改您的收藏

public virtual ICollection<Interest> Interests { get; set; }

不要忘记将DbSet添加到上下文中。对Friends和其他字符串集重复。

ApplicationUser ICollection成员未保存在DB中

1 个答案: