app\Product::create PHP Method

    public static function create(array $attr = [])
    {
        if (isset($attr['features']) && is_array($attr['features'])) {
            $attr['features'] = json_encode($attr['features']);
        }
        return parent::create($attr);
    }

 /**
  * Store a newly created resource in storage.
  *
  * @param  Request  $request
  * @return Response
  */
 public function store(Request $request)
 {
     $this->validate($request, ['name' => 'required', 'units' => 'required']);
     Product::create($request->all());
     message()->success('Successfully created Product');
     return ['location' => action('ProductsController@index')];
 }