node.js - Express JS 验证器函数错误

Question

我正在学习如何使用 Express JS 制作一个登录系统，并且在 Validator 函数中遇到了这个错误，我不知道它出了什么问题，语法上没有任何问题，它在我在 Github 和其他网站上搜索后观看的教程中工作，我什么也没找到，当我问某人时，他告诉我一些有关 NodeJs 版本的信息，但我对此不确定，我不知道如何解决这个问题。

这是我的错误:

//the erorr msg

 erorrFormatter: fuction(param, msg, value){
                                              ^

SyntaxError: Unexpected token {
    at new Script (vm.js:74:7)
    at createScript (vm.js:246:10)
    at Object.runInThisContext (vm.js:298:10)
    at Module._compile (internal/modules/cjs/loader.js:670:28)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
    at Module.load (internal/modules/cjs/loader.js:612:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
    at Function.Module._load (internal/modules/cjs/loader.js:543:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:744:10)
    at startup (internal/bootstrap/node.js:238:19)

<小时/>

这是我的代码:

//my server code

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var bodyParser = require('body-parser');
var session = require('express-session');
var passport = require('passport');
var expressValidator = require('express-validator');
var LocalStrategu = require('passport-local').Strategy;
var multer = require('multer');
var upload = multer({dest: './uploads'});
var flash = require('connect-flash');
var mongo = require('mongodb');
var mongoose = require('mongoose');
var db = mongoose.connection;

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

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')));

//Handel sessions
app.use(session({
        secret: 'secret',
        saveUninitialized: true,
        resave: true
        }));

//Passport
app.use(passport.initialize());
app.use(passport.session());

//Validator
app.use(expressValidator({
    erorrFormatter: fuction(param, msg, value){
        var namespace = param.split('.');
        var root = namespace.shift();
        var formOaram = root;
    while(namespace.length){
        formParam += '[' + namespace.shift() + ']';
}
    return{
        param : formParam,
        msg   : msg,
        value : value
     };
    }

}));

app.use(require('connect-flash')());
app.use(function (req, res, next) {
  res.locals.messages = require('express-messages')(req, res);
  next();
});



app.use('/', 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;

Answer 1

好的，在您的代码中有以下内容；

erorrFormatter: fuction(param, msg, value){

其中缺少n，因此替换为；

erorrFormatter: function(param, msg, value){

本例中存在简单的打印错误，但添加 n 应该很快就能解决