Laravel: 如何从查询生成器对象中获取值

Question

我是 laravel 的新人。我有一个 table 但没有这方面的模型。我在下面使用来获取记录。

$classes = DB::table('school_classes')->get();
return view('classes', ['allClass' => $classes]);

下面returns：

[{"id":1,"register_school_id":1,"class":"I","section":"A","created_at":"2020-03-19 00:00:00","updated_at":"2020-03-19 00:00:00"},
{"id":2,"register_school_id":1,"class":"I","section":"B","created_at":"2020-03-19 00:00:00","updated_at":"2020-03-19 00:00:00"},
{"id":3,"register_school_id":1,"class":"I","section":"C","created_at":"2020-03-19 00:00:00","updated_at":"2020-03-19 00:00:00"},    {"id":4,"register_school_id":1,"class":"I","section":"D","created_at":"2020-03-19 00:00:00","updated_at":"2020-03-19 00:00:00"},        
{"id":5,"register_school_id":1,"class":"I","section":"E","created_at":"2020-03-19 00:00:00","updated_at":"2020-03-19 00:00:00"}]

我如何才能分别选择每个项目的值...我尝试了 foreach 但出现错误。请帮助。提前致谢。

Answer 1

查询生成器 returns 一个 Illuminate\Support\Collection 实例。您可以通过以下方式访问该集合：

@foreach($allClass as $class)
    {{ $class->id }}
@endforeach

同时勾选 Collections

Answer 2

您想获取数组格式的数据，那么您可以使用“toArray”，也可以使用 foreach 循环 Laravel 函数轻松访问数据。

$classes = DB::table('school_classes')->get()->toArray();

return view('classes', ['allClass' => $classes]);

Laravel: 如何从查询生成器对象中获取值

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