Question

我希望将值保留在multiselect中，但是它显示未定义的偏移量：2。刀片文件的代码如下所示。

<select multiple="multiple" name="warehouseId[]" id="warehouse" class="form-control" style="width:100%;">
@if($warehouseData)
  @foreach ($warehouseData as $key => $warehouse)
    <option value="{{$warehouse->id}}" >{{$warehouse->name}} {{$adminUserWarehouseSelectedData[$key]->id}}</option>
  @endforeach
@endif
</select>

Answer 1

添加@isset指令

<select multiple="multiple" name="warehouseId[]" id="warehouse" class="form-control" style="width:100%;">
   @if($warehouseData)
      @foreach ($warehouseData as $key => $warehouse)
         @isset($adminUserWarehouseSelectedData[$key]->id)
           <option value="{{$warehouse->id}}">
            {{$warehouse->name}} {{$adminUserWarehouseSelectedData[$key]->id}}
           </option>
         @endisset
      @endforeach
  @endif
</select>

未定义的偏移量：Laravel 5中的2

1 个答案: