代码第一种子Asp。net标识

如果您有一个实时应用程序并运行了迁移,那么您的代码将无法运行!上下文。角色。Any()将为false,因为您现在有了角色。要使脚本幂等,请执行以下操作:

protected override void Seed(myDbContext context)
{

    var userManager = new UserManager<AppUser, Guid>(new UserStore<AppUser, AppRole, Guid, AppUserLogin, AppUserRole, AppUserClaim>(context));
    var roleManager = new RoleManager<AppRole, Guid>(new RoleStore<AppRole, Guid, AppUserRole>(context));

    // see if this role exists -- repeat for all roles
    if (!context.Roles.Any(r => r.Name == "admin"))
    {
        var adminRole = new AppRole() {Name = "admin"};
        roleManager.Create(adminRole);
    }

    // see if the user exists -- repeat for all users
    if (!context.Users.Any(u => u.UserName == "test@test.com")
    {
        var admin = new Admin()
        {
            UserName = "test@test.com",
            EmailConfirmed = true,
            SecurityStamp = Guid.NewGuid().ToString()
        };
        userManager.Create(admin, "pwd");
    }

    // see if the user has the role -- repeat for all roles for user, all users
    if (!userManager.IsInRole(admin.Id, "admin")
    {
         userManager.AddToRole(admin.Id, "admin")
    }

    ...

    base.Seed(context);

}

易于理解的添加了else if条件并创建了新角色