Laravel Blade：在对象中调用属性会导致 NULL

Posted 2023-03-14

【中文标题】Laravel Blade：在对象中调用属性会导致 NULL

【英文标题】：Laravel Blade: calling property in object results in NULL

【发布时间】：2018-08-13 16:09:16

【问题描述】：

我正在使用刀片来显示一个包。该软件包包含一些选项，它们是真还是假。但是，当我尝试使用刀片访问这些选项时，它返回 NULL。这是完整的 JSON 对象$item：

"id":1,"name":"Budget Pakket","created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","script_options":["id":1,"name":"CMS","price":506,"parent_id":null,"type_id":3,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":1,"included":1,"id":2,"name":"Foto Album","price":481,"parent_id":null,"type_id":2,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":2,"included":1,"id":3,"name":"Parallax Images","price":643,"parent_id":null,"type_id":1,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":3,"included":1,"id":4,"name":"Meerdere Menus","price":868,"parent_id":null,"type_id":3,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":4,"included":1,"id":5,"name":"Logo Design","price":370,"parent_id":null,"type_id":1,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":5,"included":0,"id":6,"name":"Deadline","price":179,"parent_id":null,"type_id":2,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":6,"included":0,"id":7,"name":"Thema Op Maat","price":146,"parent_id":null,"type_id":3,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":7,"included":0,"id":8,"name":"Thema Kant-en-Klaar","price":390,"parent_id":null,"type_id":1,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":8,"included":1,"id":9,"name":"Bulk Email","price":311,"parent_id":null,"type_id":1,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":9,"included":0,"id":10,"name":"Layouts","price":497,"parent_id":null,"type_id":1,"created_at":"2018-03-05 20:38:36","updated_at":"2018-03-05 20:38:36","pivot":"package_id":1,"script_option_id":10,"included":1]

所以，据我所知，这应该可以显示script_options：

 $item->script_options 

我也尝试使用这些代码行遍历它们：

@foreach($item->script_options as $option)
    <tr>
         $option 
    </tr>
@endforeach

但由于某种原因，它会返回 NULL....

编辑

我用

检索了结果

$result = Package::with('scriptOptions')->get();
return view('package.index', compact('result'));

然后我使用这个遍历 3 个结果：

@foreach($result as $item)
    ......
@endforeach

编辑 2

【参考方案1】：

在您的刀片文件顶部尝试 dd($result) 以查看 $result 中是否包含数据。

【讨论】：

我已经在编辑中显示了结果。数据一切正常

您是否已将列从script_options 更新为scriptOptions？

显示 dd($item->script_options) 的回复

这当然不能在页面顶部完成。但是，我使用 dd($result[0]->script_options) 来获得您想要的结果，并返回null