/**
  * Run the database seeds.
  *
  * @return void
  */
 public function run()
 {
     //
     $dataset = new \App\Dataset();
     $dataset->fill(['name' => 'test dataset', 'description' => '这是个测试数据集']);
     $dataset->save();
     for ($i = 0; $i < 10; $i++) {
         $si = new \App\StandardItem();
         $si->fill(['name' => 'test' . str_random(5), 'path' => 'test/' . str_random(10), 'dataset_id' => $dataset->id]);
         $si->save();
     }
 }