php Laravel 5.1 从空值创建默认对象
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Laravel 5.1 Creating default object from empty value
提问by Kristin K
I am using Laravel 5.1 PHP framework. When I try to update my record, I get the error:
我正在使用 Laravel 5.1 PHP 框架。当我尝试更新我的记录时，出现错误：
"ErrorException in AdminController.php line 108: Creating default object from empty value".
“AdminController.php 第 108 行中的 ErrorException：从空值创建默认对象”。
I have searched in google but I can't find any results to solve my problem.
我在谷歌搜索过，但找不到任何结果来解决我的问题。
Routes
路线
Route::get('/admin/no', 'AdminController@index');
Route::get('/admin/product/destroy/{id}', 'AdminController@destroy');
Route::get('/admin/new', 'AdminController@newProduct');
Route::post('/admin/product/save', 'AdminController@add');
Route::get('/admin/{id}/edit', 'AdminController@edit');
Route::patch('/admin/product/update/{id}', 'AdminController@update')
AdminController
管理控制器
public function edit($id)
{
$product = Product::find($id);
return view('admin.edit', compact('product'));
}
public function update(Request $request, $id)
{
$product = Product::find($id);
$product->id = Request::input('id');
$product->name = Request::input('name');
$product->description = Request::input('description');
$product->price = Request::input('price');
$product->imageurl = Request::input('imageurl');
$product->save();
//return redirect('/admin/nο');
}
enter code here
edit.blade.php
编辑刀片.php
div class="panel panel-info">
<div class="panel-heading">
<div class="panel-title">Edit Product</div>
</div>
<div class="panel-body" >
<form action="/admin/product/update/{id}" method="POST"><input type="hidden" name="_method" value="PATCH"> <input type="hidden" name="_token" value="{{ csrf_token() }}">
enter code here
回答by Ivanka Todorova
The problem is that $product = Product::find($id);returns NULL. Add the check:
问题是$product = Product::find($id);返回NULL. 添加检查：
if(!is_null($product) {
//redirect or show an error message
}
Though this is your update method, so probably you're having an error while building the url for this method. It might be a wrong id you're passing to this route.
虽然这是您的更新方法，但您可能在为此方法构建 url 时遇到错误。您传递给这条路线的 ID 可能是错误的。
Your form actionhas an error:
您的表单action有错误：
<form action="/admin/product/update/{id}" method="POST">
Notice the curly braces, Blade's syntax is {{ expression }}, not just {}. So idis never passed to the product.updateroute. Just change it to:
注意花括号，Blade 的语法是{{ expression }}，而不仅仅是{}. 所以id永远不会传递给product.update路由。只需将其更改为：
<form action="/admin/product/update/{{$id}}" method="POST">
回答by Hiren Makwana
For update entity in laravel uses PUTmethod not POST. update form method and try.
对于 laravel 中的更新实体，使用PUT方法而不是POST。更新表单方法并尝试。
<form action="/admin/product/update/{id}">
<input name="_method" type="hidden" value="PUT">
回答by Samvedna
check if the product exists then do the update The form will look like this
检查产品是否存在，然后进行更新表单将如下所示
<form action="/admin/product/update/{{$id}}" method="POST">
<form action="/admin/product/update/{{$id}}" method="POST">
$ sign was missing:)
$ 符号丢失:)
