Authorization not working for Users Search - php

Question

I'm using Laravel 5.1.26, including authorizations with policies. I have a basic ACL model where a user has a Role, of course an integer Role field.
My Roles are:
0 - Administrator (can perform any operation over users);
1- Operator (can't perform any operation over users);
2- Viewer (can't perform any operation over users).
I provide the option to perform a User's search. Only Administrators can perform this because my roles definition. So, I have a method in the UserController to display my results:
public function postSearch(Request $request)
{
$this->authorize('search', User::class);
$query = User::select('name', 'email')
->where('name', 'LIKE', "%$request->name%")
->where('email', 'LIKE', "%$request->email%")
->where('role', '=', "%$request->role%");
return $this->displayResult($query, $request);
}
As you see, the authorize method perform the validation, and the rest of code creates the result. Simple.
Problem is because if I search (using an Administrator user for all cases) for an Operator user, then all my operations are disabled: create, delete, edit, etc. Same behaviour if I search for a Viewer user.
But if I search for an Administrator user, then all my operations are enabled!
So, I guess that the authorize method is receiving the user found! Not the user authenticated. How can I solve this? I'm passing the User::class because if I don't pass anything, then my Policies don't work (therefore, I followed the last comment here https://laracasts.com/discuss/channels/laravel/laravel-511s-new-authorization-doesnt-read-policies/?page=2).
Thanks.

Answer 1

After perfom another Search option on my application, I found that Eloquent is a little bit different than usual and I created a Search method on my model. Which basically perform this:
public function scopeSearch($query, $field, $value)
{
if(is_numeric($value))
return $query->where($field, '=', "$value");
else
return $query;
}
So, I changed my original code to this and my Role is an integer:
public function postSearch(Request $request)
{
$this->authorize('search', User::class);
$query = User::select('name', 'email')
->where('name', 'LIKE', "%$request->name%")
->where('email', 'LIKE', "%$request->email%")
->search('role', "$request->role");
return $this->displayResult($query, $request);
}
Now works fine!