PbootCMS中判断文章列表是否有缩略图并避免默认图片的显示

 <ul class="note-ul">
        {pboot:list scode={sort:scode}}
        <li class="note-li">
            <a href="[list:link]" rel="external nofollow" title="[list:title]">
                <div class="flex-column">
                    {pboot:if('[list:isico]' == '1')}
                    <div class="img-box">
                        <img src="[list:ico]" alt="[list:title]">
                    </div>
                    {/pboot:if}
                    
                </div>
            </a>
        </li>
        {/pboot:list}
    </ul>