Express.js：變量存儲在`res.locals`未在該視圖中定義

在明示應用，我使用在app.js作爲聲明明示路由器：Express.js：變量存儲在`res.locals`未在該視圖中定義

var adminRouter = require('./admin'); 
app.use("/admin", adminRouter);

所以它引用其中i的所限定的本特定路由admin.js文件：

router.route('/rooms/edit/:id') 
    .all(function(req, res, next) { 
     var roomid = req.params.id; 
     var room = _.find(rooms, r => r.id == roomid); 
     if (!room) { 
      res.sendStatus(404); 
      return; 
     } 
     res.locals.room = room; 
     next(); 
    }).get(function(req, res) { 

     res.render('edit', { room: room }); 
    }).post(function(req, res) { 

     res.locals.room.name = req.body.name; 
     res.redirect('./'); 
    });

但在用於編輯房間名稱（通過在上面的路由。獲得方法訪問）的視圖我得到這個錯誤說，room變量i存儲在res.locals未定義：

ReferenceError: room is not defined

這裏是整個app.js

var express = require('express'); 
var app = express(); 
var bodyParser = require('body-parser'); 


app.set("views", "./views"); 
app.set("view engine", "jade"); 

app.use(express.static("public")); 
app.use(bodyParser.urlencoded({extended:true})); 


app.use(function(req, res, next){ 
    console.log('incomming req : ' + req.url); 
    next(); 
}); 

app.get('/', function(req, res){ 
    res.render('index', {title:'Home'}); 
}); 

var adminRouter = require('./admin'); 
app.use("/admin", adminRouter); 

app.listen(3000, function(){ 
    console.log('app running on port 3000'); 
});

，這是edit.jade觀點太：

extends layout 
block content 
h1 Edit chatroom!! 
form(method="POST") 
     fieldset.form-group 
      label(for="name") Name: 
      input.form-control(name="name", type="text", placeholder="Enter a name" value="#{room.name}") 
      small.text-muted Give your chatroom a meaningful name for people to refer to it. 
     button.btn.btn-primary(type="submit") Save chatroom 
     a.btn.btn-default(href="/admin/rooms") Cancel

來源

2016-11-28 Bardelman

我得到這個錯誤說，room變量i存儲在res.locals未定義：
ReferenceError: room is not defined 

這不是錯誤說什麼：它說，一個變量稱爲沒有定義room。它應該也指出你的代碼中的錯誤發生的線，這是在這裏：

res.render('edit', { room: room });

哪裏，其實room是不確定。

來源

2016-11-28 08:45:58 robertklep

Express.js：變量存儲在`res.locals`未在該視圖中定義

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