public function run()
 {
     DB::table('suppliers')->delete();
     DB::table('categories')->delete();
     $categories = [['slug' => 'otomotif', 'name' => 'Otomotif'], ['slug' => 't-shirt', 'name' => 'T-Shirt', 'childs' => [['slug' => 'woman', 'name' => 'Woman'], ['slug' => 'man', 'name' => 'Man']]], ['slug' => 'electronic', 'name' => 'Electronic', 'childs' => [['slug' => 'laptop', 'name' => 'Laptop'], ['slug' => 'handphone', 'name' => 'Handphone']]]];
     $categories = collect($categories)->map(function ($cat) {
         $category = App\Models\Category::create(['slug' => $cat['slug'], 'name' => $cat['name']]);
         if (array_key_exists('childs', $cat)) {
             foreach ($cat['childs'] as $cate) {
                 App\Models\Category::create(['slug' => $cat['slug'], 'name' => $cat['name'], 'parent_id' => $category->id]);
             }
         }
         return $category;
     });
     $users = App\Models\User::all();
     $users->each(function ($user) use($categories) {
         $suppliers = factory(App\Models\Supplier::class, 10)->create();
         $suppliers->each(function ($supplier) use($categories, $user) {
             $supplier->users()->attach($user);
             $cat_ids = $categories->pluck('id');
             $cat_pick = $cat_ids->random();
             factory(App\Models\Product::class, 15)->create(['supplier_id' => $supplier->id, 'category_id' => $cat_pick]);
         });
     });
 }