yii2上传文件里面的动态表单返回无法识别的表情

Question

我有我的动态表单使用wbraganca小部件和kartik文件上传里面。当我打开页面时，该字段仅显示微调图片而不是文本字段，控制台显示“无法识别的表达式：#tcandidateexp - {$ i} -prod_per_year_file”。我想用作文件上传的字段是“prod_per_year_file”。任何帮助将不胜感激。谢谢。

<?php $form = ActiveForm::begin(['id' => 'dynamic-form', 'options'=>['enctype'=>'multipart/form-data']]); ?> 
<div class='row'>  
    <?php DynamicFormWidget::begin([ 
     'widgetContainer' => 'dynamicform_wrapper', // required: only alphanumeric characters plus "_" [A-Za-z0-9_] 
     'widgetBody' => '.container-items', // required: css class selector 
     'widgetItem' => '.item', // required: css class 
     'limit' => 5, // the maximum times, an element can be added (default 999) 
     'min' => 1, // 0 or 1 (default 1) 
     'insertButton' => '.add-item', // css class 
     'deleteButton' => '.remove-item', // css class 
     'model' => $models_exp[0], 
     'formId' => 'dynamic-form', 
     'formFields' => [ 
      'start_year', 
      'end_year', 
      'company', 
      'prod_per_year', 
      'prod_per_year_file', 
      'inc_per_year', 
      'inc_per_year_file' 
     ], 
    ]); ?> 

    <div class="panel panel-default" style="width:85%"> 
     <div class="panel-heading"> 
      <h4> 
       <i class="glyphicon glyphicon-envelope"></i> Experiences 
       <button type="button" class="add-item btn btn-success btn-sm pull-right"><i class="glyphicon glyphicon-plus"></i> Add</button> 
      </h4> 
     </div> 
     <div class="panel-body"> 
      <div class="container-items"><!-- widgetBody --> 
      <?php foreach ($models_exp as $i => $model_exp): ?> 
       <div class="item panel panel-default"><!-- widgetItem --> 
        <div class="panel-heading"> 
         <h3 class="panel-title pull-left">Detail</h3> 
         <div class="pull-right"> 
          <button type="button" class="remove-item btn btn-danger btn-xs"><i class="glyphicon glyphicon-minus"></i></button> 
         </div> 
         <div class="clearfix"></div> 
        </div> 
        <div class="panel-body"> 
         <?php 
          // necessary for update action. 
          if (! $model_exp->isNewRecord) { 
           echo Html::activeHiddenInput($model_exp, "[{$i}]id"); 
          } 
         ?> 

         <div class="row"> 
          <div class="col-sm-6" > 
           <?=           
            $form->field($model_exp, "[{$i}]start_year")->textInput(); 
           ?> 
          </div> 

          <div class="col-sm-2"> 
           <?= 
            $form->field($model_exp, "[{$i}]end_year")->textInput(); 
           ?> 
          </div> 
          <div class="col-sm-2"> 
           <?= 
            $form->field($model_exp, "[{$i}]company")->textInput(); 
           ?> 
          </div> 

          <div class="col-sm-10"> 
           <?= $form->field($model_exp, "[{$i}]prod_per_year")->textInput() ?> 
          </div> 

          <div class="col-sm-10"> 
           <?php 
            //$form->field($model_exp, "[{$i}]prod_per_year_file")->textInput() 
       echo $form->field($model_exp, '[{$i}]prod_per_year_file')->widget(FileInput::classname(), [ 
             'pluginOptions' => [ 
              'showPreview' => false, 
              'showCaption' => true, 
              'showRemove' => true, 
              'showUpload' => false 
             ] 
            ]); 
           ?> 
          </div> 

          <div class="col-sm-10"> 
           <?= $form->field($model_exp, "[{$i}]inc_per_year")->textInput() ?> 
          </div> 

          <div class="col-sm-10"> 
           <?= $form->field($model_exp, "[{$i}]inc_per_year_file")->textInput() ?> 
          </div> 
         </div><!-- .row --> 
        </div> 
       </div> 
      <?php endforeach; ?> 
      </div> 
     </div> 
    </div><!-- .panel --> 
    <?php DynamicFormWidget::end(); ?> 
</div> 

Answer 1

尝试用双引号

echo $form->field($model_exp, "[{$i}]prod_per_year_file")->widget(FileInput::classname(), [ 
             'pluginOptions' => [ 
              'showPreview' => false, 
              'showCaption' => true, 
              'showRemove' => true, 
              'showUpload' => false 
             ] 
            ]);