PHP动态列的总和

Question

I would like to have the sum of the 4th column of a table, and I dry miserably.

My controller:

public function ticket()
{
    $cmdbars = DB::table('bars')
             ->orderBy('updated_at', 'asc')
             ->get();

    return view('bar_iframe', compact('cmdbars'));
}

My view :

<table>
@foreach($cmdbars as $cmdbar)

<tr>
    <td>
        {{ $cmdbar->la_qtt }}
    </td>
    <td>
        {{ $cmdbar->la_denom }}
    </td>
    <td class="txtr">
        {{ number_format($cmdbar->le_tarif_bar/100, 2, '.', ' ') }}
    </td>
    <td class="txtr">
        @php
        $sum_produit = $cmdbar->le_tarif_bar * $cmdbar->la_qtt;
        @endphp
        {{ number_format($sum_produit/100, 2, '.', ' ') }}
    </td>
</tr>
@endforeach

<tr>
    <td colspan="4">
        <div class="total_cmd">
            {{-- HERE, I would like the sum of the 4th column --}} €
        </div>
    </td>
</tr>

I'm looking for a day and I'm blocking on this problem, Thanks for your help

Answer 1

Something like this should be working:

{{ number_format($cmdbars->sum(function($el) {return $el->le_tarif_bar * $el->la_qtt; })/100, 2, '.', ' ') }}

(assuming you are using Laravel 5.3.+ where Query builder is returning collection of elements - method sum is used here)

Also I don't see any point in using:

@php
$sum_produit = $cmdbar->le_tarif_bar * $cmdbar->la_qtt;
@endphp
{{ number_format($sum_produit/100, 2, '.', ' ') }}

Use:

{{ number_format(($cmdbar->le_tarif_bar * $cmdbar->la_qtt)/100, 2, '.', ' ') }}

instead. Using PHP in Blade (or generally in views) is bad practice and should be avoided if possible.

EDIT

Personally I would use Eloquent for this and create Bar model and get bars like this:

$cmdbars = Bar::orderBy('updated_at', 'asc')->get();

In Bar model I would add accessor:

public function getPriceAttribute()
{
   return $this->le_tarif_bar * $this->la_qtt;
}

and then in view instead of:

@php
$sum_produit = $cmdbar->le_tarif_bar * $cmdbar->la_qtt;
@endphp
{{ number_format($sum_produit/100, 2, '.', ' ') }}

I would use:

{{ number_format($cmdbar->price/100, 2, '.', ' ') }}

and to get sum I would use:

{{ number_format($cmdbars->sum('price')/100, 2, '.', ' ') }}