错误日志：TypeError: ejs:57
    55|                 <%- includes('comHtml/topNav.ejs') %>
    56|                 <div class="proDetailPage-main">
 >> 57|                     <!-- <p><%= JSON.stringify(productDetail.data.ancestors) %></p>
    58|                     <p><%= JSON.stringify(productDetail.data.classifyName) %></p>
    59|                     <p><%= JSON.stringify(productDetail.data.productClassifyId) %></p> -->
    60|                     <div class="proDetailPage-con">

Cannot read properties of undefined (reading 'ancestors')