本文介绍了Laravel检查集合是否为空的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我已经在Laravel网络应用程序中找到了它:
I've got this in my Laravel webapp:
@foreach($mentors as $mentor)
@foreach($mentor->intern as $intern)
<tr class="table-row-link" data-href="/werknemer/{!! $intern->employee->EmployeeId !!}">
<td>{{ $intern->employee->FirstName }}</td>
<td>{{ $intern->employee->LastName }}</td>
</tr>
@endforeach
@endforeach
我如何检查是否有$mentors->intern->employee
?
当我这样做时:
@if(count($mentors))
它不会检查.
推荐答案
您始终可以对集合进行计数.例如,$mentor->intern->count()
将返回导师的实习生人数.
You can always count the collection. For example $mentor->intern->count()
will return how many intern does a mentor have.
https://laravel.com/docs/5.2/collections#method-count
在您的代码中,您可以执行以下操作
In your code you can do something like this
foreach($mentors as $mentor)
@if($mentor->intern->count() > 0)
@foreach($mentor->intern as $intern)
<tr class="table-row-link" data-href="/werknemer/{!! $intern->employee->EmployeeId !!}">
<td>{{ $intern->employee->FirstName }}</td>
<td>{{ $intern->employee->LastName }}</td>
</tr>
@endforeach
@else
Mentor don't have any intern
@endif
@endforeach
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