How to use whereDoesntHave in Laravel?

I have this relationship:

public function OrdersMaterial()
    {
        return $this->belongsToMany('App\Material', 'Orders_has_Material', 
          'Orders_id', 'Material_id')->withPivot('quantity');
}

I want to get the materials that don't bellongs to order_has_materials in dates bellongs

$materials = Material:: whereDoesntHave('Orders_has_Material', function ($query) use ($userOrder) {
        $query->where('date_final', $userOrder->date_final);
        $query->where('date_begin', $userOrder->date_begin);})->get();

I'm getting Call to undefined method Illuminate\Database\Query\Builder::Orders_has_Material()

This is the best approach ?

from Newest questions tagged laravel-5 - Stack Overflow http://ift.tt/2DpGjgS
via IFTTT