javascript - 切换页面，为什么我routes里面req.session.userid存在，却无法在客户端上显示<%=userid%>的值？

Answer 1

The userid is given in roomview.html: roomview.html里给了userid：

res.render('roomview', {
    userid: req.session.userid,
    rooms:docs
});

而addroom.html的路由里你没写：

res.render('addroom.html')

所以自然找不到。

如果你希望ejs里可以直接获取session里的信息，可以尝试使用locals，比如前置一个中间件：

app.use(function(req, res, next) {
  res.locals.userid = req.session.userid;
  next();
});

这样，你的ejs模版里就可以直接使用<%= userid %> rrreee

And you didn’t write in the route of addroom.html: 🎜 rrreee 🎜So naturally I can’t find it. 🎜 🎜If you want ejs to directly obtain the information in session, you can try to use locals, such as prefixing a middleware: 🎜 rrreee 🎜In this way, you can directly use <%= userid %> in your ejs template🎜

Answer 2

The pictures I drew are quite beautiful