Blade中的过滤数组

Question

我需要展示某张图片。如果图片 is_primary 属性已填充且为真，那么我需要显示该图片。否则，我应该只显示第一个。这是我的代码。它不起作用，我同时看到 is_primary 图片和第一张。我做错了什么？

@php
  $check = 0
@endphp
@foreach ($ad->photos as $photo)
  @if ($photo->is_primary == true)
    <img src="{{$photo->filename}}" alt="{{$ad->name}}" class="card-image">
    @php
      $check = 1
    @endphp
  @endif
@endforeach

@if ($check > 0)
  <img src="{{$ad->photos->first()->filename}}" alt="{{$ad->name}}" class="card-image">
@endif

Answer 1

你逻辑有问题。如果 is_primary 为真，则显示图像并将标志变量设置为 1。循环结束时你正在检查 $check > 0 所以当 $check =1 你需要添加条件 $check == 0

时它是真的

@php
  $check = 0
@endphp
@foreach ($ad->photos as $photo)
  @if ($photo->is_primary == true)
    <img src="{{$photo->filename}}" alt="{{$ad->name}}" class="card-image">
    @php
      $check = 1
    @endphp
  @endif
@endforeach

@if ($check == 0)
  <img src="{{$ad->photos->first()->filename}}" alt="{{$ad->name}}" class="card-image">
@endif

或者您可以检查 != 1

@if ($check != 1)
      <img src="{{$ad->photos->first()->filename}}" alt="{{$ad->name}}" class="card-image">
    @endif

Blade中的过滤数组

Filtering array in Blade

php

laravel

blade