在表单中插入多个记录

Question

我试图从表单中一次插入几条记录 This is how the form appears

     <label>Drug</label>
        <select class="form-inline input-sm " name="drug[]" id="drug">
             @foreach($drugs as $key => $drug)
                    <option value="{{$drug->id}}"> {{$drug->name}}</option>
             @endforeach
         </select>

      <input class="input-sm" type="number" class="form-control" id="amount_received" name="amount_received[]" placeholder="Amount received">

      <button type="button" name="add" id="add">Add More</button>

      <button type="submit" class="btn btn-primary"id="submit">Submit</button>

我的控制器

public function addNewStock()
{
    $input = Input::all();
    $insert = array();
    foreach($input['drug'] as $key => $drug) {
        $insert[$key]['drug'] = $drug;
    }
    foreach($input['amount_received'] as $item => $amount_received) {
        $insert[$item]['amount_received'] = $amount_received;
    }
    Stock::insert($insert);

}

这是我得到的结果（$ input）。这是在我提交两条记录之后，问题是它选择了最后一条记录并在数据库中保存了两次

array:3 [▼
  "_token" => "Oz9cSvNuPmPPHKAw6uKbnmA5DIMBsxKsnubaliHt"
  "drug" => array:2 [▼
    0 => "1"
1 => "10"
  ]
  "amount_received" => array:2 [▼
0 => "2"
1 => "4"
  ]
]

请帮忙。