了解MVC-5身份

Question

我创建了一个新的ASP.NET MVC-5应用程序,Individual User Accounts然后更新Nuget packages了解决方案中的所有内容.现在我试图遵循一些教程中显示的一些指导原则,但我遇到了一些问题.第一个是ApplicationRoleManager未创建在整个应用程序中使用的类(ApplicationUserManager已创建).第二个问题更多的是Entity-Framework:我已经看到,为了向用户和角色播种数据库,许多人在ApplicationDbContext类中创建了一个静态构造函数:

    static ApplicationDbContext()
    {
        Database.SetInitializer<ApplicationDbContext>(new ApplicationDbInitializer());
    }

所以我添加了它,并且实现的ApplicationDbInitializer是:

public class ApplicationDbInitializer : DropCreateDatabaseIfModelChanges<ApplicationDbContext>
{
    protected override void Seed(ApplicationDbContext context)
    {
        InitializeIdentityForEF(context);
        base.Seed(context);
    }

    //Create User=Admin@Admin.com with password=Admin@123456 in the Admin role
    public static void InitializeIdentityForEF(ApplicationDbContext db)
    {
        var userManager = HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>();
        var roleManager = HttpContext.Current.GetOwinContext().Get<ApplicationRoleManager>();
        const string name = "admin@admin.com";
        const string password = "Admin@123456";
        const string roleName = "Admin";

        //Create Role Admin if it does not exist
        var role = roleManager.FindByName(roleName);
        if (role == null)
        {
            role = new IdentityRole(roleName);
            var roleresult = roleManager.Create(role);
        }

        var user = userManager.FindByName(name);
        if (user == null)
        {
            user = new ApplicationUser { UserName = name, Email = name };
            var result = userManager.Create(user, password);
            result = userManager.SetLockoutEnabled(user.Id, false);
        }

        // Add user admin to Role Admin if not already added
        var rolesForUser = userManager.GetRoles(user.Id);
        if (!rolesForUser.Contains(role.Name))
        {
            var result = userManager.AddToRole(user.Id, role.Name);
        }
    }

添加完所有内容后,我打开Package Manager Console并输入Enable-Migrations,然后Add-Migration someName再打开Update-Database.结果是数据库已成功创建,但没有数据插入数据库.
在注意到未插入数据后,我将Seed逻辑移动到主控制器的Index方法,并在运行应用程序后插入数据.我还需要将这一行添加 app.CreatePerOwinContext<ApplicationRoleManager>(ApplicationRoleManager.Create); 到Startup.Auth.cs文件中.
所以我的问题是:

1. 我真的需要ApplicationRoleManager手动输入课程吗？
2. 如何使该seed方法有效？

更新
我已将Seed方法更改为:

protected override void Seed(ApplicationDbContext context)
    {
        var userManager = HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>();

        //since there is no ApplicationRoleManager (why is that?) this is how i create it
        var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context));

        const string name = "admin@admin.com";
        const string password = "Admin@123456";
        const string roleName = "Admin";

        //Create Role Admin if it does not exist
        var role = roleManager.FindByName(roleName);
        if (role == null)
        {
            role = new IdentityRole(roleName);
            var roleresult = roleManager.Create(role);
        }
        //app hangs here...
        var user = userManager.FindByName(name);
        if (user == null)
        {
            user = new ApplicationUser { UserName = name, Email = name };
            var result = userManager.Create(user, password);
            result = userManager.SetLockoutEnabled(user.Id, false);
        }

        // Add user admin to Role Admin if not already added
        var rolesForUser = userManager.GetRoles(user.Id);
        if (!rolesForUser.Contains(role.Name))
        {
            var result = userManager.AddToRole(user.Id, role.Name);
        }
        base.Seed(context);
    }

所以现在,Admin角色已经创建,但是当到达var user = userManager.FindByName(name);应用程序时,挂起时没有异常或任何消息......

Answer 1

使用迁移时,您可以使用内置初始化程序和Seed方法:

Database.SetInitializer<ApplicationDbContext>(new 
    MigrateDatabaseToLatestVersion<ApplicationDbContext, 
    APPLICATION.Migrations.Configuration>());

和APPLICATION.Migrations.Configuration(这是由Enable-Migrations命令创建的):

protected override void Seed(ApplicationDbContext context)
{
    // seed logic
}

作为角色管理器,您还可以使用RoleManager<ApplicationRole>基本实现.