Question

我如何从laravel中的会话中删除数据。我不想通过单击单个删除按钮来删除所有数据。我有每个数据的删除按钮，所以想一个一个地删除。我当前的代码如下：

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            <ng-content></ng-content>
            <span *ngIf="isSortedByMeAsc" class="glyphicon glyphicon-triangle-top" aria-hidden="true"></span>
            <span *ngIf="isSortedByMeDesc" class="glyphicon glyphicon-triangle-bottom" aria-hidden="true"></span>
        </a>

我也尝试过

public function deleteProduct(Request $request){
    $id = $request->productId;// this id i want to delete which i get from view
    $products = $request->session()->get('product');

    foreach ($products as $key => $value)
    {
        if ($value['id'] == $id)
        {
            unset($products [$key]);
        }
    }

    //then you can redirect or whatever you need
    return redirect()->back();
}

我在会话中的数据采用以下格式

foreach ($products as $product)
{
    if ($product->id == $id)
    {
        $products->forget($product);
    }
}

在我的网络标签中，当我单击删除按钮时出现以下错误

[
{
id: 2,
name: "Marlene Reichert",
description: "Debitis asperiores sed sit assumenda unde quo natus. Consequatur est labore tenetur quae. Eius distinctio ea omnis aspernatur porro earum quae.",
category_id: 3,
price: 76,
image: "http://loremflickr.com/400/300?random=71",
created_at: "2019-07-16 10:12:27",
updated_at: "2019-07-16 10:12:27",
qty: 1
},
{
id: 6,
name: "Kaylin Emard",
description: "Et aperiam omnis nam iure id non fugiat. Excepturi voluptatem ipsam magnam. Esse asperiores ducimus enim et.",
category_id: 8,
price: 14,
image: "http://loremflickr.com/400/300?random=17",
created_at: "2019-07-16 10:12:27",
updated_at: "2019-07-16 10:12:27",
qty: 1
},
{
id: 5,
name: "Prof. Iliana Mohr",
description: "Autem sequi esse laudantium ut ut explicabo enim. Corporis cupiditate dolorum et ratione sequi architecto. Vitae enim ex hic nihil.",
category_id: 2,
price: 207,
image: "http://loremflickr.com/400/300?random=99",
created_at: "2019-07-16 10:12:27",
updated_at: "2019-07-16 10:12:27",
qty: 1
}
]

在dd（）上

{message: "Invalid argument supplied for foreach()", exception: "ErrorException",…}
exception: "ErrorException"
file: "/Applications/XAMPP/xamppfiles/htdocs/fresh/app/Http/Controllers/ProductController.php"
line: 33
message: "Invalid argument supplied for foreach()"
trace: [{file: "/Applications/XAMPP/xamppfiles/htdocs/fresh/app/Http/Controllers/ProductController.php",…},…]
0: {file: "/Applications/XAMPP/xamppfiles/htdocs/fresh/app/Http/Controllers/ProductController.php",…}
1: {function: "deleteProduct", class: "App\Http\Controllers\ProductController", type: "->"}
2: {,…}

在我的网络标签中，我得到了

$id = $request->productId;
    $products = $request->session()->get('product');
    dd($products);

Answer 1

$request->session()->forget('product');将从会话中删除整个密钥，而您不希望这样做。所以...

如何从laravel中的会话中删除数据。

您的情况是：

public function deleteProduct(Request $request){
    $id = $request->productId;

    // Get the array from session.
    $products = $request->session()->get('product');

    // Remove unwanted key from array.
    foreach ($products as $key => $value)
    {
        if ($value->id == $id)
        {
            unset($products[$key]);
        }
    }

    // Override the session.
    $request->session()->put('product', $products);

    return redirect()->back();
}

例如，如果有一天在系统中添加了deleteAllProducts()功能，那么最好致电$request->session()->forget('product');

Answer 2

尝试此代码

$request->session()->forget('product');

Answer 3

不能将foreach用于数组，而应使用for循环

for($x = 0;$x<sizeOf($products);$x++)
{
  $product = $products[$x];
  #then do your manipulation here
}

如何从会话Laravel中删除项目

3 个答案: