错误日志：TypeError: ejs:51
    49|             <% categorizedProducts.forEach((item,index)=>{ %>
    50|                 <% item.children.length = 0 %>
 >> 51|                 <% productList.rows.forEach((item1,index1)=>{ %>
    52|                     <% if(item1.classifyName == item.classifyName){ %>
    53|                         <% item.children.push(item1) %>
    54|                     <% } %>

Cannot read properties of undefined (reading 'forEach')