问如果导入csv - Laravel刀片中只存在一条记录，则出现Foreach错误

EN

<?php $__currentLoopData = $line; $__env->addLoop($__currentLoopData); foreach($__currentLoopData as $field): $__env->incrementLoopIndices(); $loop = $__env->getLastLoop(); ?>

<table class="table">
 @if (isset($headers))
     <tr>
       @foreach ($headers as $field)
           <th>{{ $field }}</th>
       @endforeach
      </tr>
 @endif
 @if($lines)
     @foreach ($lines as $line)
      <tr>
       @foreach ($line as $field)
           <td>{{ $field }}</td>
       @endforeach
      </tr>
     @endforeach
 @endif
     <tr>
         @foreach ($headers as $key => $header)
           <td>
              <select name="fields[{{ $key }}]">
                 <option value=''>Please select</option>
                     @foreach ($fillables as $k => $fillable)
                        <option value="{{ $fillable }}"
                            @if (strtolower($header) === strtolower($fillable)) selected @endif>{{ $fillable  }}</option>
                     @endforeach
              </select>
           </td>
      @endforeach
    </tr>
  </table>

public function parse(Request $request)
    {
        $file = $request->file('csv_file');
        $request->validate([
            'csv_file' => 'mimes:csv,txt',
        ]);

        $path = $file->path();
        $hasHeader = $request->input('header', false) ? true : false;

        $reader = new SpreadsheetReader($path);
        $headers = $reader->current();
        $lines = [];
        $lines[] = $reader->next();
        $lines[] = $reader->next();

        $filename = Str::random(10).'.csv';
        $file->storeAs('csv_import', $filename);

        $modelName = $request->input('model', false);
        $fullModelName = 'App\\'.$modelName;

        $model = new $fullModelName();
        $fillables = $model->getFillable();

        $church_id = $request->input('church_id');
        $interest_tags = $request->input('interest_tags');

        if ($modelName == 'Interest') {
            $custom_fields = CustomField::where('created_by_team_id', $church_id)->pluck('name')->toArray();
            if (! empty($custom_fields)) {
                $fillables = array_merge($fillables, $custom_fields);
            }
        }

        $is_adding_new_religious_background = $request->input('is_adding_new_religious_background', false) ? true : false;

        $redirect = url()->previous();

        return view(
            'csvImport.parse_import',
            compact('headers', 'filename', 'fillables', 'church_id', 'interest_tags', 'hasHeader', 'modelName', 'lines', 'redirect', 'is_adding_new_religious_background')
        );