c# - 如何解决错误 "The foreign key name was not found on the dependent type "

Question

我有一个应用程序，我在 IDENTITY 的帮助下创建了登录名:

在 userTable 中，我创建了一些自定义属性，其中有一个名为“orgId”的属性，它让我知道用户属于哪个组织。

我在 sql-managment studio 中创建了组织表，到目前为止一切都很好。

orgId 是对组织表(如下图)的引用，我不知道如何使该属性成为用户表上的外键。

每次运行应用程序时，我都会得到:

The foreign key name 'OrganizationId' was not found on the dependent type

我的代码:

public class ApplicationUser : IdentityUser
{
    [Required]
    public string FirstName { get; set; }
    [Required]
    public string LastName { get; set; }
    [Required]
    [ForeignKey("OrganizationId")]
    public Organizations OrgId { get; set; }

    public virtual ICollection<Organizations> Organizations { get; set; }

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        // Add custom user claims here

        userIdentity.AddClaim(new Claim("FirstName", this.FirstName));

        return userIdentity;

    }
}

组织类别:

public class Organizations
{
    public long OrganizationId { get; set; }
    public string OrganizationName { get; set; }

    public virtual ApplicationUser User { get; set; }
}

图像:

在发布此内容之前，我尝试了一些操作，并希望它们删除所有身份生成的表，但它不起作用，现在我收到上面的错误，该错误不允许我创建任何内容。

我对身份还很陌生，可能做错了什么。

我在这里缺少什么？

编辑:

在 @Adil Mammadov 的回答非常有帮助之后，我不断收到其他错误。

我当前的错误:

An exception of type 'System.Data.Entity.ModelConfiguration.ModelValidationException' occurred in mscorlib.dll but was not handled in user code

Additional information: One or more validation errors were detected during model generation: ApplicationUser_Organization_Source: : Multiplicity is not valid in Role 'ApplicationUser_Organization_Source' in relationship 'ApplicationUser_Organization'. Because the Dependent Role properties are not the key properties, the upper bound of the multiplicity of the Dependent Role must be '*'.

我认为最好指出以下几点: 在我的startup.cs中我有这个:

公共(public)无效配置(IAppBuilder应用程序) { 配置身份验证(应用程序)； 创建角色和用户()； }

    private void createRolesandUsers()
    {
        ApplicationDbContext context = new ApplicationDbContext();

        var roleManager = new RoleManager<ApplicationRole>(new RoleStore<ApplicationRole>(new ApplicationDbContext()));
        var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));

        // In Startup iam creating first Admin Role and creating a default Admin User    
        if (!roleManager.RoleExists(OverWatchRoles.SuperDeveloper.ToString()))
        {

            // first we create Admin rool   
            var role = new ApplicationRole();
            role.Name = "SuperDeveloper";

            roleManager.Create(role);

            //Here we create a Admin super user who will maintain the website                  

            var user = new ApplicationUser();
            user.UserName = "UserName";
            user.Email = "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5e3327303f333b1e33273b333f3732703d3133" rel="noreferrer noopener nofollow">[email protected]</a>";
            user.FirstName = "Me";
            user.LastName = "Info";
            user.OrgId = 0;

            string userPWD = "123MyPassWord!'#";

            var chkUser = UserManager.Create(user, userPWD);

            //Add default User to Role Admin   
            if (chkUser.Succeeded)
            {
                var result1 = UserManager.AddToRole(user.Id, OverWatchRoles.SuperDeveloper.ToString());
            }
        }

        if (!roleManager.RoleExists("Developer"))
        {
            var role = new ApplicationRole();
            role.Name = "Developer";
            roleManager.Create(role);

        }

        if (!roleManager.RoleExists("SuperAdministrator"))
        {
            var role = new ApplicationRole();
            role.Name = "SuperAdministrator";
            roleManager.Create(role);

        }

        if (!roleManager.RoleExists("Administrator"))
        {
            var role = new ApplicationRole();
            role.Name = "Administrator";
            roleManager.Create(role);

        }

        // creating Creating Employee role    
        if (!roleManager.RoleExists("Employee"))
        {
            var role = new ApplicationRole();
            role.Name = "Employee";
            roleManager.Create(role);

        }
    }

Answer 1

您的模型不正确。您的 ApplicationUser 模型中没有 OrganizationId，但您将其指定为外键。此外，您还为 Organization 添加了两个导航属性:

// Yes, this is a navigation property
public Organizations OrgId { get; set; } 

// This is also navigation property
public virtual ICollection<Organizations> Organizations { get; set; }

您的模型应如下所示:

public class ApplicationUser : IdentityUser
{
    [Required]
    public string FirstName { get; set; }
    [Required]
    public string LastName { get; set; }
    [Required]    
    public long OrgId { get; set; }

    // Indicates that OrgId is foreign key for Organization navigation property
    [ForeignKey("OrgId")] 
    public virtual Organizations Organization { get; set; }

    ....
}   

public class Organizations
{
    [Key]
    public long OrganizationId { get; set; }
    public string OrganizationName { get; set; }

    public virtual ICollection<ApplicationUser> Users { get; set; }
}

另请考虑将 Organizations 类的名称更改为 Organization。

更新。

这是一对多关系。因此，在Organization模型中导航属性必须是ApplicationUser的集合。