select2 js 在 select 选项中加载空值

Question

我在我的项目中实施了 select2js，在少数情况下，当我加载我的页面时，我的 select 输入框会附加一个空值。谁能帮帮我，这是什么问题，我添加了它的图像，我的代码是

{!! Form::select('searchSkillTools[]',[],(isset($skillToolXref) && $skillToolXref!='')?$skillToolXref:'', array('autocomplete' => 'off', 'class' => 'chosen-select','multiple'=>'multiple', 'id' => 'searchSkillTools-'.$randomId, 'placeholder' => '' ,'style' => 'height: auto !important')) !!}

$('#searchSkillTools-{{$randomId}}').select2({  
    ajax: {
        url: skillToolUrl,
        dataType: 'json',
        method:'get',
        delay: 250,//delay in response
        data: function (data) {
            return {
                search: data.term //search term
            };
        },
        /*option to transform the data returned by response into the format expected by Select2*/
        processResults: function (response) {            
            return {
                results:response
            };
        },
        cache: true
    }
});

Answer 1

这种方式将修复错误：

(isset($skillToolXref) && $skillToolXref!='')?$skillToolXref:null

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laravel-5

jquery-select2