换种使用方法
'source'=>[

            'attribute' => 'source',
            'contentOptions' => [
                        'width'=>'70'
                    ],
            'value'=>function($model){return  TDriverWand::getWandSource($model->source);},
            'filterType'=>kartik\grid\GridView::FILTER_SELECT2,
            'filter'=>TDriverWand::getWandSource(), 
            //'filter' => ArrayHelper::map(Author::find()->orderBy('name')->asArray()->all(), 'id', 'name'),
            'filterWidgetOptions'=>[
                'pluginOptions'=>['allowClear'=>true],
            ],
            'filterInputOptions'=>['placeholder'=>'请选择...'],
            'group'=>false,  // enable grouping
            ],