X-Editable Yii1中源为空时加载列表时出错

Question

我正在使用Yii1和X-editable。我将数据提供给源。但是，当数组为空时，会给我错误“加载列表时出错”。 我将如何向Select这样的数组中添加空选项。

In Image when source is blank it gives error and I want to put and empty option to the select.

$this->widget('zii.widgets.grid.CGridView', array(
        'id' => 'fees-master-grid',
        'htmlOptions'=>array('class'=>'adv-table'),
        'itemsCssClass'=>'display table table-bordered table-striped dataTable',
        'pagerCssClass'=>'dataTables_paginate paging_bootstrap pagination',
        'dataProvider' => $model->search(),
        'columns'=>array(
    array
                    (
                        'class' => 'application.extensions.editable.EditableColumn',
                        'name' => 'fees',
                        'headerHtmlOptions' => array('style' => 'text-align:left;'),
                        'editable' => array(//editable section
                            'type' => 'select',
                            'source' => CHtml::listData(CodeMaster::model()->findAll(array('order' => 'code ASC')), 'code_id', 'code'),
                             'url'        => $this->createUrl('/code/update', array('model'=>'CodeMaster', 'field'=>'fees')),
                            'onShown' => 'js: function(event) {
                                var tip = $(this).data("editableContainer").tip();
                                tip.find("input").focus();
                            }',
                            'success' => 'js: function(response, newValue) {
                                if(!response.success) return response.msg;
                            }',
                            'options' => array(
                                'ajaxOptions' => array('dataType' => 'json'),
                            )
                        )
                    ),
)));