php - 即使未选择，Laravel 下拉列表也会获取所有选项

Question

我有一个下拉菜单，可以在其中显示我的产品属性，并且无论我是否选择任何选项，它都会将所有选项添加到我的购物车所选产品下。

我需要的是只获取选定的选项，或者如果没有选择任何选项，则将其保留为空。

这是我的 Blade 代码:

<tbody>
  @foreach($options as $optiontitle => $optioncollection)
  <tr>
    <td style="width: 150px;">{{ $optiontitle }}</td>
    <td class="text-left">
      <select name="attr" class="form-control">
       <option value="">Select</option>
       @foreach($optioncollection as $suboption)
         <option value="{{$suboption->id}}">{{$suboption->title}} - {{ number_format($suboption->price, 0) }}</option>
       @endforeach
      </select>
    </td>
  </tr>
  @endforeach
</tbody>

这是我的属性的 Controller 方法，我称之为选项

$options = $product->suboptions->mapToGroups(function ($item, $key) {
  return [$item->option->title => $item];
});

这是我的购物车方法，事情发生时所有东西都会添加到购物车而不是仅选择。

public function addingItem(Request $request, $id)
    {
      $product = Product::where('id', $id)->firstOrFail();

      $customAttributes = [];
      if(!empty($product->suboptions)){
          foreach($product->suboptions as $subs) {
              array_push($customAttributes, [
                  'attr' => [
                      'label' => $subs->title,
                      'price' => $subs->price,
                  ]
              ]);
          }
      }
      Cart::add(array(
        'id' => $product->id,
        'name' => $product->title,
        'price' => $product->price,
        'quantity' => $request->input('quantity'),
        'attributes' => $customAttributes,
      ));
      Session::flash('success', 'This product added to your cart successfully.');
      return redirect()->back();
    }

更新

我需要获得的是选项title和price(查看我的订单示例以了解我需要这些选项的原因和位置)

"[{\"id\":29,\"name\":\"effewf\",\"price\":24524,\"quantity\":1,\"attributes\":[{\"attr\":{\"label\":\"Gray\",\"price\":\"7000.00\"}},{\"attr\":{\"label\":\"Red\",\"price\":\"5000.00\"}},{\"attr\":{\"label\":\"15\\\"\",\"price\":\"500000.00\"}},{\"attr\":{\"label\":\"17\\\"\",\"price\":\"700000.00\"}},{\"attr\":{\"label\":\"22\\\"\",\"price\":\"900000.00\"}}],\"conditions\":[]}]"

正如您在我的 attributes 部分中看到的，我有嵌套数组，例如:

\"attributes\":[{\"attr\":{\"label\":\"Gray\",\"price\":\"7000.00\"}},....

这是我在函数循环中获取标签和价格的地方。

如果我使用循环，例如:

foreach($request->attr as $subs) {
  array_push($customAttributes, [
   'attr' => [
    'label' => $subs->title,
    'price' => $subs->price,
    ]
]);

我会得到这个错误，而不是我所拥有的:

Trying to get property of non-object

在这一行:

  'attr' => [
    'label' => $subs->title,
    'price' => $subs->price,

PS:如果我将 $customAttributes = $request->attr; 与我自己的循环(在顶部)一起使用，我将仅获得所选选项的 id ，这对我来说没有好处.

Answer 1

因为您调用了产品的 suboptions 关系，而不是从请求中获取它。您使用此 $product->suboptions 调用它，而不是从请求中获取它。

$customAttributes = $request->attr; // try to dd($customAttributes) so you can see it

更新:

您只需将 id 传递给您的选项

<select name="attr[]" class="form-control" multiple>
   <option value="">Select</option>
   @foreach($optioncollection as $suboption)
     <option value="{{$suboption->id}}">{{$suboption->title}} - {{ number_format($suboption->price, 0) }}</option>
   @endforeach
</select>

并在您的 Controller 中，获取它们并验证

public function addingItem(Request $request, $id)
{
    $product = Product::findOrFail($id);

    $customAttributes = [];
    if (!empty($request->attr)) {
        foreach ($request->attr as $sub) {
            // You should fetch the price from the database NOT from the user 
            //   request as it will be very vulnerable to attacks

            // find the suboption
            $sub = Suboption::find($sub); // Here I assume you have the Model 
                                    // for your Product's suboptions
            if (!empty($sub->id)) {
                array_push($customAttributes, [
                    'attr' => [
                        'label' => $sub->title,
                        'price' => $sub->price,
                    ]
                ]);
            }
        }
    }

    Cart::add(array(
        'id' => $product->id,
        'name' => $product->title,
        'price' => $product->price,
        'quantity' => $request->input('quantity'),
        'attributes' => $customAttributes,
    ));

    Session::flash('success', 'This product added to your cart successfully.');
    return redirect()->back();
}