Retrieve models that belongsToMany specific models - php

Question

I've got a standard many-to-many relationship
class User {
public function roles() {
return $this->belongsToMany('Role');
}
}
class Role {
public function users() {
return $this->belongsToMany('User');
}
}
And it works very well.
But I need to select all the users that has exactly two specific roles.
$roleAdmin = Role::where('name', 'admin')->first();
$roleUser = Role::where('name', 'user')->first();
$users = //which users has BOTH $roleAdmin and $roleUser ??
Is it possible to achieve this using eloquent or I need a raw query?
PS the use-case is stupid, I know, it's just an abstraction of my real problem (that doesn't concern users and roles)

Answer 1

The best solution I found is to get admins and users and then use intersect() helper to get only users who are present both in $users and admins collections:
$users = User::whereHas('roles', function ($q) use($otherRoles) {
$q->where('name', 'user')->whereNotIn('name', $otherRoles);
})->get();
$admins = User::whereHas('roles', function ($q) use($otherRoles) {
$q->where('name', 'admin')->whereNotIn('name', $otherRoles);
})->get();
$result = $admins->intersect($users);
If you want to save some memory, you could pluck() only IDs, intersect() these and only then get users with whereIn().

Answer 2

This is not an eloquent solution(by all means)
$users = \DB::table('users')
->select(\DB::raw("GROUP_CONCAT(roles.name SEPARATOR '-') as `role_names`"), 'users.name')
->join('role_user', 'users.id', '=', 'role_user.user_id')
->join('roles', 'roles.id', '=', 'role_user.role_id')
->groupBy('users.id')
->having('role_names', '=', 'admin-user')
->get();
admin-user can be user-admin, which roles names comes first in the database. Please change table and column names as per your requirement