错误日志：TypeError: ejs:87
    85|         <% } %>
    86| 
 >> 87|         <% const classifyToCheckId = productDetail.data.ancestors || String(productDetail.data.productClassifyId); %>
    88| 
    89|         <% const classifyToCheckName = productDetail.data.ancestorsName || productDetail.data.classifyName; %>
    90| 

Cannot read properties of undefined (reading 'ancestors')