javascript - 我收到错误 "indexRouter is not defined"

Question

我在尝试执行以下代码时收到错误“indexRouter 未定义”。我尝试删除该行，但又出现其他错误。谁能告诉我为什么我们对两个索引使用这个公共(public)变量路由器.js 和 user.js？

这是我的 app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var bodyParser = require('body-parser');

var index = require('./routes/index');
var users = require('./routes/users');
var dishRouter = require('./routes/dishRouter');

const mongoose = require('mongoose');
mongoose.Promise = require('bluebird');
const Dishes = require('./models/dishes');

const url = 'mongodb://localhost:27017/conFusion';
const connect = mongoose.connect(url,{
  useMongoClient : true
});

connect.then((db) => {
  console.log('Connected correctly to the server');
},(err) => {console.log(err);});

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/index',indexRouter);
app.use('/users',usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

这是我的index.js

var express = require('express');
var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});

module.exports = router;

这是我的 users.js

var express = require('express');
var router = express.Router();

/* GET users listing. */
router.get('/', function(req, res, next) {
  res.send('respond with a resource');
});

module.exports = router;

Answer 1

您使用了错误的变量。

var index = require('./routes/index');
var users = require('./routes/users');

app.use('/index',indexRouter); // it would be index
app.use('/users',usersRouter); // it would be users

从 indexRouter 更改为 index，将 userRouter 更改为 users。