Laravel 使用 foreach 对每个部分求和

Question

我有下表的数据。

    ID - CLASS - CATEGORY - AMOUNT
    --------------------------------
     1    I       A          5000
     2    I       B          6000
     3    I       C          7000
     4    V       A          9000
     5    V       B          12000

现在我想在blade.php 中使用foreach 循环对数量进行分类。比如I类总共18000，V类21000等等。

控制器功能：

   $viewRecords = YearlyFees::Where('registration_id',Auth::user()->id)->get();

    return view('yearly_fees_setup',
        ['viewRecords' => $viewRecords]);

Blade.php

     @foreach($viewRecords as $record)
                <tr>
                    <td>{{$record->Standard->class}}</td>

                    <td>
                        {{$record->Category->category}}
                    </td>
                    <td>{{$record->amount}}
                    </td>
                </tr>
            <tr>
            <td> ?????? TOTAL of each class </td></tr>
            @endforeach

结果：

Class   Category          Amount
I       School Fees       5000
I       Tution Fees       6000
I       Library Fees      7000
                         **I WANT TOTAL HERE**
V       School Fees       9000
V       Tution Fees       12000
                         **I WANT TOTAL HERE**

请帮忙

Answer 1

您需要在 for 循环中创建一个（或两个）变量，以便有条件地回显总数。

@php
$total = 0;
$category = null;
@endphp
@foreach(...)
    @php
    $total += $record->amount;
    @endphp
    @if ($category != $record->category)
        {{ $total }}
    @endif
@endforeach