Question

当我尝试向角色添加新用户时出现异常：

ArgumentException：实体类型＆＃39; IdentityUserRole＆＃39;使用单个键属性定义，但将2个值传递给＆＃39; DbSet.Find＆＃39;方法

这是在下面的行

userManager.AddToRoleAsync(user, "Admin");

这是Startup类中的方法：

private async Task CreateRoles(IServiceProvider serviceProvider) {
    //adding custom roles
    var roleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole<int>> > ();
    var userManager = serviceProvider.GetRequiredService<UserManager<UserEntity>>();
    string[] roleNames = { "Admin", "Manager", "User" };
    IdentityResult roleResult;

    foreach (var roleName in roleNames) {
        //creating the roles and seeding them to the database
        var roleExist = await roleManager.RoleExistsAsync(roleName);
        if (!roleExist) {
            roleResult = await roleManager.CreateAsync(
                new IdentityRole<int> {
                    Name = roleName,
                    NormalizedName = roleName.ToUpper()
                });
        }
    }

    //creating a super user who could maintain the web app
    var poweruser = new UserEntity {
        UserName = Configuration["AdminUserName"],
        Email = Configuration["AdminUserEmail"],
        Password = Configuration["AdminUserPassword"],
        ResidendceId = int.Parse(Configuration["AdminUserCountryId"])
    };

    string UserPassword = Configuration["AdminUserPassword"];
    UserEntity user = await userManager.FindByEmailAsync(Configuration["AdminUserEmail"]);

    if (user == null) {
        var createPowerUser = await userManager.CreateAsync(poweruser);
        user = poweruser;
    }

    var adminRoleList = await userManager.GetUsersInRoleAsync("Admin");
    if (user != null && !adminRoleList.Any(u => u.Email == user.Email)) {

        //here we tie the new user to the "Admin" role 
        await userManager.AddToRoleAsync(user, "Admin");
    }
}

有什么想法吗？感谢

Answer 1

在您的DbContext类中添加以下内容

builder.Entity<IdentityUserRole<int>>(b =>
{
    b.HasKey(i => new {i.UserId, i.RoleId});
});

这应该为DbFind提供所需的两个键。

ASP.NET CORE 2 - 实体类型＆＃39; IdentityUserRole <int>＆＃39;使用单个键属性定义，但将2个值传递给＆＃39; DbSet.Find＆＃39;方法

1 个答案: