我试图创建一个调查网站，所以我找到了一些我想对其进行测试并根据需要进行更改的示例，但问题是当我选择问题类型为“收音机”或“复选框”时，我收到此错误消息：
Invalid argument supplied for foreach() (View: /Users/ANA/laravel/app/resources/views/survey/detail.blade.php)
我现在知道传递给 foreach 有问题，但我不知道是什么！这是我第一次使用 Laravel，这就是为什么我很难知道发生了什么。
这是错误消息后突出显示的代码：
</div>
</div>
<?php elseif($question->question_type === 'radio'): ?>
<?php $__currentLoopData = $question->option_name; $__env->addLoop($__currentLoopData); foreach($__currentLoopData as $key=>$value): $__env->incrementLoopIndices(); $loop = $__env->getLastLoop(); ?>
<p style="margin:0px; padding:0px;">
<input type="radio" id="<?php echo e($key); ?>" />
<label for="<?php echo e($key); ?>"><?php echo e($value); ?></label>
</p>
<?php endforeach; $__env->popLoop(); $loop = $__env->getLastLoop(); ?>
<?php elseif($question->question_type === 'checkbox'): ?>
<?php $__currentLoopData = $question->option_name; $__env->addLoop($__currentLoopData); foreach($__currentLoopData as $key=>$value): $__env->incrementLoopIndices(); $loop = $__env->getLastLoop(); ?>
<p style="margin:0px; padding:0px;">
<input type="checkbox" id="<?php echo e($key); ?>" />
<label for="<?php echo e($key); ?>"><?php echo e($value); ?></label>
</p>
<?php endforeach; $__env->popLoop(); $loop = $__env->getLastLoop(); ?>
<?php endif; ?>
<?php echo Form::close(); ?>
这是代码detail.blade.php：
@extends('master')
@section('title', 'Survey')
@section('content')
<div class="card">
<div class="card-content">
<span class="card-title"> {{ $survey->title }}</span>
<p>
{{ $survey->description }}
</p>
<br/>
<a href='view/{{$survey->id}}'>Take Survey</a> | <a href="{{$survey->id}}/edit">Edit Survey</a> | <a href="/survey/answers/{{$survey->id}}">View Answers</a> <a href="#doDelete" style="float:right;" class="modal-trigger red-text">Delete Survey</a>
<!-- Modal Structure -->
<!-- TODO Fix the Delete aspect -->
<div id="doDelete" class="modal bottom-sheet">
<div class="modal-content">
<div class="container">
<div class="row">
<h4>Are you sure?</h4>
<p>Do you wish to delete this survey called "{{ $survey->title }}"?</p>
<div class="modal-footer">
<a href="/survey/{{ $survey->id }}/delete" class=" modal-action waves-effect waves-light btn-flat red-text">Yep yep!</a>
<a class=" modal-action modal-close waves-effect waves-light green white-text btn">No, stop!</a>
</div>
</div>
</div>
</div>
</div>
<div class="divider" style="margin:20px 0px;"></div>
<p class="flow-text center-align">Questions</p>
<ul class="collapsible" data-collapsible="expandable">
@forelse ($survey->questions as $question)
<li style="box-shadow:none;">
<div class="collapsible-header">{{ $question->title }} <a href="/question/{{ $question->id }}/edit" style="float:right;">Edit</a></div>
<div class="collapsible-body">
<div style="margin:5px; padding:10px;">
{!! Form::open() !!}
@if($question->question_type === 'text')
{{ Form::text('title')}}
@elseif($question->question_type === 'textarea')
<div class="row">
<div class="input-field col s12">
<textarea id="textarea1" class="materialize-textarea"></textarea>
<label for="textarea1">Provide answer</label>
</div>
</div>
@elseif($question->question_type === 'radio')
@foreach($question->option_name as $key=>$value)
<p style="margin:0px; padding:0px;">
<input type="radio" id="{{ $key }}" />
<label for="{{ $key }}">{{ $value }}</label>
</p>
@endforeach
@elseif($question->question_type === 'checkbox')
@foreach($question->option_name as $key=>$value)
<p style="margin:0px; padding:0px;">
<input type="checkbox" id="{{ $key }}" />
<label for="{{$key}}">{{ $value }}</label>
</p>
@endforeach
@endif
{!! Form::close() !!}
</div>
</div>
</li>
@empty
<span style="padding:10px;">Nothing to show. Add questions below.</span>
@endforelse
</ul>
<h2 class="flow-text">Add Question</h2>
<form method="POST" action="{{ $survey->id }}/questions" id="boolean">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
<div class="row">
<div class="input-field col s12">
<select class="browser-default" name="question_type" id="question_type">
<option value="" disabled selected>Choose your option</option>
<option value="text">Text</option>
<option value="textarea">Textarea</option>
<option value="checkbox">Checkbox</option>
<option value="radio">Radio Buttons</option>
</select>
</div>
<div class="input-field col s12">
<input name="title" id="title" type="text">
<label for="title">Question</label>
</div>
<!-- this part will be chewed by script in init.js -->
<span class="form-g"></span>
<div class="input-field col s12">
<button class="btn waves-effect waves-light">Submit</button>
</div>
</div>
</form>
</div>
</div>
@endsection你能帮我吗，我在这里苦苦挣扎，我不知道出了什么问题。