c# - 使用 RoleManager 创建新角色

Question

我创建了一个上下文(带有脚手架)和一个用户。我还设置了播放数据库(并创建了一个迁移)。这非常有效!我现在只想创建一个角色，然后将其分配给用户。

为此，我修改了我的 startup.cs 文件以便继续(我找不到说明如何创建/分配具有与 ApplicationDbContext 不同上下文的角色的教程)。

我对代码中的错误很满意(至少我认为是这样)，但我不知道如何处理它以及用什么替换对象。

所以我创建了一个 CreateRoles 方法来接收一个 serviceProvider(类型为 IServiceProvider)，在这个方法中我尝试初始化 romes，然后将它们分配给我的数据库的不同用户。

我的担忧就在这里(我认为):

var RoleManager = serviceProvider.GetRequiredService > ();

确实，除了我使用 jakformulaireContext 之外，我认为它用于 ApplicationDbContext。

我的问题是:我应该更换什么(如果那是我需要更换的)？

如果您需要模式信息或模式代码，请告诉我!

启动类

公开课启动{ public Startup(IConfiguration配置) { 配置=配置；

public IConfiguration Configuration { get; }

// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
    services.Configure<CookiePolicyOptions>(options =>
    {
        // This lambda determines whether user consent for non-essential cookies is needed for a given request.
        options.CheckConsentNeeded = context => true;
        options.MinimumSameSitePolicy = SameSiteMode.None;
    });

    services.AddDbContext<jakformulaireContext>(options =>
        options.UseSqlServer(
            Configuration.GetConnectionString("jakformulaireContextConnection")));
    services.AddDefaultIdentity<jakformulaireUser>(configg =>
    {
        configg.SignIn.RequireConfirmedEmail = true;
    }).AddEntityFrameworkStores<jakformulaireContext>(); ;


    var config = new AutoMapper.MapperConfiguration(cfg =>
    {
        cfg.AddProfile(new MappingProfile());
    });
    var mapper = config.CreateMapper();
    services.AddSingleton(mapper);

    //services.AddAutoMapper();
    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

    services.AddDistributedMemoryCache();

    services.AddSession();

    // requires
    // using Microsoft.AspNetCore.Identity.UI.Services;
    // using WebPWrecover.Services;
    services.AddSingleton<IEmailSender, EmailSender>();
    services.Configure<AuthMessageSenderOptions>(Configuration);

    services.AddCors(options =>
    {
        options.AddPolicy("CorsPolicy",
            builder => builder.AllowAnyOrigin()
            .AllowAnyMethod()
            .AllowAnyHeader()
            .AllowCredentials());
    });
}

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider serviceProvider)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
        app.UseDatabaseErrorPage();
    }
    else
    {
        app.UseExceptionHandler("/Home/Error");
        app.UseHsts();
    }

    app.UseHttpsRedirection();
    app.UseStaticFiles();
    app.UseCookiePolicy();
    app.UseSession();

    app.UseAuthentication();

    app.UseCors("CorsPolicy");

    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "default",
            template: "{controller=Home}/{action=Index}/{id?}");
    });

    //CreateRoles(serviceProvider).Wait();
}

private async Task CreateRoles(IServiceProvider serviceProvider)
{
    //initializing custom roles   
    var RoleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
    var UserManager = serviceProvider.GetRequiredService<UserManager<jakformulaireUser>>();
    string[] roleNames = { "Guest", "Member", "Admin" };
    IdentityResult roleResult;

    foreach (var roleName in roleNames)
    {
        var roleExist = await RoleManager.RoleExistsAsync(roleName);
        if (!roleExist)
        {
            //create the roles and seed them to the database: Question 1  
            roleResult = await RoleManager.CreateAsync(new IdentityRole(roleName));
        }
    }

    jakformulaireUser user = await UserManager.FindByEmailAsync("test@test.com");

    if (user == null)
    {
        user = new jakformulaireUser()
        {
            UserName = "test@test.com",
            Email = "test@test.com",
            EmailConfirmed = true
        };
        await UserManager.CreateAsync(user, "Test123$");
    }
    await UserManager.AddToRoleAsync(user, "Member");


    jakformulaireUser user1 = await UserManager.FindByEmailAsync("test@live.be");

    if (user1 == null)
    {
        user1 = new jakformulaireUser()
        {
            UserName = "test@live.be",
            Email = "test@live.be",
            EmailConfirmed = true
        };
        await UserManager.CreateAsync(user1, "Test123$");
    }
    await UserManager.AddToRoleAsync(user1, "Admin");

}

上下文

public class jakformulaireContext : IdentityDbContext<jakformulaireUser>
{
    public jakformulaireContext(DbContextOptions<jakformulaireContext> options)
        : base(options)
    {

    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);
    }
}

Answer 1

此错误通常在您创建自己的 IdentityRole 时发生或者当您忘记注册 RoleManager 时.

1. 如果您通过 class jakformulaireContext : IdentityDbContext<YourAppUser, YourIdentityRole> 自定义了上下文, 确保在任何地方使用 RoleManager<IdentityRole>服务已替换为 RoleManager< YourIdentityRole>

2. 此外，确保 RoleManager<YourIdentityRole>已注册 。如果您不创建自己的 IdentityRole 版本, 只需调用 .AddRoleManager<RoleManager<IdentityRole>>()

    services.AddIdentity<jakformulaireUser, IdentityRole>() 
       .AddRoleManager<RoleManager<IdentityRole>>()  // make sure the roleManager has been registered .
       .AddDefaultUI() 
       // other features ....
       .AddEntityFrameworkStores<jakformulaireContext>()