Question

嗨，我是laravel的新手并且不能很好地理解sections，但是我试图在一个循环中只显示一个特定的一个，然后重复其他一切，如果某个条件为真。这是我试图修改的代码。在这里，我评论了我只想要一次的线。

 @foreach ($pageTypes['news-events']->categories as $cat)
    <?php  $related = $page->relatedPages($pageTypes['news-events']->id, $cat->id); ?>
    @if ($related->count() > 0) 
        @section('tab-titles')
        //i want to display this LI once if true  
        <li class="tab first"><a href="#news" title="insight">Insight</a></li>
        @append
        @section('news-content')
            <div id="news" class="tabs_text">
                <h2>{{ strtoupper($cat->name) }} 
                </h2>
                <ul>
                @foreach($related as $news)
                    <li><a href="{{ url($news->url) }}" title="{{ $news->title }}">
                            {{ $news->title }}
                        </a>
                    </li>
                @endforeach
                </ul>
            </div>
        @append
    @endif
  @endforeach

Answer 1

你应该使用else，因为你只想显示一次

在此处查看文档link

@if ($related->count() > 0)
    @section('news-content')
        <div id="news" class="tabs_text">
            <h2>{{ strtoupper($cat->name) }} 
            </h2>
            <ul>
            @foreach($related as $news)
                <li><a href="{{ url($news->url) }}" title="{{ $news->title }}">
                        {{ $news->title }}
                    </a>
                </li>
            @endforeach
            </ul>
        </div>
    @append
@else
    @section('tab-titles')
    //i want to display this LI once if true  
    <li class="tab first"><a href="#news" title="insight">Insight</a></li>
    @append
@endif

Answer 2

您可以添加一个简单变量来检查之前是否显示过某个部分。

 $check = 0; 
@foreach ($pageTypes['news-events']->categories as $cat)
        <?php  $related = $page->relatedPages($pageTypes['news-events']->id, $cat->id); ?>

        @if ($related->count() > 0)


          if($check==0)
    {
            @section('tab-titles')
    //i want to display this LI once if true  
      <li class="tab first"><a href="#news" title="insight">Insight</a></li>
            @append
    $check++;
    }
            @section('news-content')
                <div id="news" class="tabs_text">
                    <h2>{{ strtoupper($cat->name) }} 
                    </h2>
                    <ul>
                    @foreach($related as $news)
                        <li><a href="{{ url($news->url) }}" title="{{ $news->title }}">
                                {{ $news->title }}
                            </a>
                        </li>
                    @endforeach
                    </ul>
                </div>
            @append
        @endif
      @endforeach

Answer 3

不知道这是最优雅的解决方案。但是你可以按照以下方式实现你想要的目标：

<?php $repeat = true; // first initialize as true ?>
@foreach ($pageTypes['news-events']->categories as $cat)
  <?php  $related = $page->relatedPages($pageTypes['news-events']->id, $cat->id); 

?>

    @if ($related->count() > 0)
       @if($your_certain_condition == true && $repeat)
        <?php $repeat = false; ?>
        @section('tab-titles')
         <li class="tab first"><a href="#news" title="insight">Insight</a></li>
        @append
      @endif 

        @section('news-content')
            <div id="news" class="tabs_text">
                <h2>{{ strtoupper($cat->name) }} 
                </h2>
                <ul>
                @foreach($related as $news)
                    <li><a href="{{ url($news->url) }}" title="{{ $news->title }}">
                            {{ $news->title }}
                        </a>
                    </li>
                @endforeach
                </ul>
            </div>
        @append
    @endif
  @endforeach

在@foreach循环中显示一个@section

3 个答案: