Laravel 5.3 and nested relations many-to-many

I have Laravel 5.3 and three table there.

Articles table

 id
 title
 body

Systems table

 id
 title
 slug

Sections table

 id
 title
 slug

One article can have/haven't systems or sections (like categories and subcategories). So articles have many-to-many relations with Systems and Sections in pivot tables

article_systems table

 id
 system_id
 article_id

article_sections table

 id
 section_id
 article_id

I am getting in index view all articles with filters by four ways:

• all articles
• all articles with given section
• all articles with given system and any section
• all articles with given system and given section

I use the solution - combine parameters in the ArticlesController and make Query via Scopes.

ArticleController.php

$URI = [];
$URI['system'] = Request::input('system');
    if(!$URI['system']){
$URI['system'] = 'all';
};
$URI['section'] = Request::input('section');
if(!$URI['section']){
    $URI['section'] = 'all';
};
$articles = Article::Published()
   ->BySystem($URI['system'])
   ->BySection($URI['section'])
   ->paginate(30);
return view('articles.index', compact('articles''URI'));

Article.php Model

public function scopeBySystem($query, $systemRequest){
    if($systemRequest && $systemRequest != 'all'  ) {
       return $query->with('systems')
          ->whereHas('systems', function ($q) use ($systemRequest) {
             $q->where('slug', $systemRequest);
          });
    }else{
        return $query;
    }
}
public function scopeBySection($query, $sectionRequest){
    if($sectionRequest && $sectionRequest != 'all'  ) {
       return $query->with('sections')
          ->whereHas('section', function ($q) use ($sectionRequest) {
             $q->where('slug', $sectionRequest);
          });
    }else{
        return $query;
    }
}

This code works. But I have my doubts. Is this the best solution that I can do?

via Chebli Mohamed