为什么laravel查看返回数组？而不是价值？

Question

这是我的控制器功能

public function index() 
{ 
    $currentdate = Carbon::yesterday(); 
    $totalsales = DB::table('receipts') 
     ->whereDate('created_at','=', $currentdate) 
     ->where('status','=', 'served') 
     ->orderBy('created_at','asc') 
     ->select(DB::raw('SUM(amount_due) as totalsales')) 
     ->get(); 
     // ->first(); 
     // return $totalsales; 
    return view('dashboard.index',compact('totalsales')); 
} 

这是我的视图

<div class="panel-body"> 
<h2>{{$totalsales}}</h2> 

insted的值本身的视图的返回这样

[{"totalsales":"130.00"}] 

Answer 1

我想你只需要在amount_due列的总和，所以你可以使用下面的查询。

$totalsales = DB::table('receipts') 
       ->whereDate('created_at','=', $currentdate) 
       ->where('status','=', 'served') 
       ->orderBy('created_at','asc') 
       ->sum('amount_due'); 

保持其他代码相同，这将为你工作。

希望你能理解

Answer 2

它没有按阵列不知道只有一个领域。

您需要可以指定

<h2>{{ $totalsales->totalsales }}</h2> 

或更改您的查询：

$totalsales = DB::table('receipts') 
    ->whereDate('created_at','=', $currentdate) 
    ->where('status','=', 'served') 
    ->orderBy('created_at','asc') 
    ->select(DB::raw('SUM(amount_due) as totalsales')) 
    ->first() 
    ->totalsales;