TypeError: /home/parse/Taotie/views/front/layouts/_header.pug:43
41| .sub-nav-list
42| ul.lv1-list
> 43| each category in categories
44| li.lv1-item
45| a(href='/category/'+category.main.id) #{category.main.name}
46| .collapse-button
Cannot read property 'length' of undefined
at eval (eval at wrap (/home/parse/Taotie/node_modules/pug-runtime/wrap.js:9:4), <anonymous>:214:31)
at eval (eval at wrap (/home/parse/Taotie/node_modules/pug-runtime/wrap.js:9:4), <anonymous>:321:4)
at template (eval at wrap (/home/parse/Taotie/node_modules/pug-runtime/wrap.js:9:4), <anonymous>:461:72)
at Object.exports.renderFile (/home/parse/Taotie/node_modules/pug/lib/index.js:428:38)
at Object.exports.renderFile (/home/parse/Taotie/node_modules/pug/lib/index.js:418:21)
at View.exports.__express [as engine] (/home/parse/Taotie/node_modules/pug/lib/index.js:465:11)
at View.render (/home/parse/Taotie/node_modules/express/lib/view.js:126:8)
at tryRender (/home/parse/Taotie/node_modules/express/lib/application.js:639:10)
at EventEmitter.render (/home/parse/Taotie/node_modules/express/lib/application.js:591:3)
at ServerResponse.render (/home/parse/Taotie/node_modules/express/lib/response.js:961:7)