在GridView的滚动上滚动整个屏幕(Scrolling the whole screen on GridView's scroll)

 您可以为每个用户分别设置。 这将工作。 但是也很难维护，你可能需要写3次函数（登录，注销，CRUD等）。 
 
 但是，您可以使用授权创建单个项目。 开箱即用，Laravel为您提供了一种简单的方法，通过Gate授权和限制某些操作或通过Policy限制模型。 您也可以通过Middleware来限制URL。 看到你有3种不同的限制行为的方式。 
 
 我的个人偏好是Policy因为它与模型绑定。 您拥有权限列表并为每个角色分配权限，例如：'create_sys_admin'。 然后将此权限链接到“root_admin”角色。 所以在你的政策中你可以写： 
 
public function createSysAdmin(User $user) {
    return $user->role->permissions->contains('create_sys_admin');
}
 
 通过定义策略，我们可以检查控制器中的propser权限。 在控制器的任何功能中，您都可以检查适当的权限 
 
if ( Auth::user()->cant('create_sys_admin', User::class) ) {
    return redirect()->back()->withErrors(['authorization' => 'You are not authorized to perform that action']);
}
 
 那只是一种方式。 正如我之前所说的，你也有盖茨和中间件。 在这里阅读更多： https : //laravel.com/docs/5.4/authorization 
 
 如果你想要一些东西，你可以使用这个包： https ： //github.com/Zizaco/entrust 。 

You could make separate setups for each users. That would work. But would also be difficult to maintain and you might have to write some functions 3 times (login, logout, CRUD, etc.).
 
However, you could create a single project using Authorizations. Out of the box, Laravel gives you an easy way to authorize and restrict some actions via Gate or restrict models via Policy. You could also restrict URLs via Middleware. See you have 3 different ways of restricting actions. 
 
My personal preference is Policy because it's bound to the model. You have a list of permissions and give each role their permissions, eg.: 'create_sys_admin'. Then link this permission to the 'root_admin' role. so in your policy you can write:
 
public function createSysAdmin(User $user) {
    return $user->role->permissions->contains('create_sys_admin');
}
 
With the policy defined, we can check for propser permission in the controller. In any function in your controller you can always check for proper permissions
 
if ( Auth::user()->cant('create_sys_admin', User::class) ) {
    return redirect()->back()->withErrors(['authorization' => 'You are not authorized to perform that action']);
}
 
That was just one way. As I previously said, you have Gates and Middlewares as well. Read more here: https://laravel.com/docs/5.4/authorization
 
If you want something already made, you can use this package: https://github.com/Zizaco/entrust.