如果出现任何验证错误，我想在同一个玉页中显示相应的错误信息（即register.jade）。如果没有，那么我想成功地在架构对象的帮助下存储数据并返回我的主页。但是目前，即使输入正确，我也会收到所有错误消息。
我正在使用Express + Node + Mongodb + Mongoose。
我可以知道如何实现它。
我关注的相关（12分55秒）视频是 - https://www.youtube.com/watch?v=jeiP4jN1mfs&list=PLNiY_2deiFolObKp8sav6TmxnnjVFuwqu&index=16
这是我的代码 -
app.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var expressValidator = require('express-validator');
var cookieParser = require('cookie-parser');
var session=require('express-session');
var passport=require('passport');
var LocalStrategy = require('passport-local').Strategy;
var bodyParser = require('body-parser');
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 index = require('./routes/index');
var users = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
//Handle Express Sessions
app.use(session({
secret:'secret',
saveUninitialized:true,
resave:true
}));
//Passport
app.use(passport.initialize());
app.use(passport.session());
//Validator
app.use(expressValidator({
errorFormatter: function(param, msg, value) {
var namespace = param.split('.')
, root = namespace.shift()
, formParam = root;
while(namespace.length) {
formParam += '[' + namespace.shift() + ']';
}
return {
param : formParam,
msg : msg,
value : value
};
}
}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(flash());
app.use(function (req, res, next) {
res.locals.messages = require('express-messages')(req, res);
next();
});
app.use('/', index);
app.use('/users', users);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// 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;
users.js（在路线文件夹内）
var express = require('express');
var router = express.Router();
var User = require('../models/user');
/* GET users listing. */
router.get('/', function(req, res, next) {
res.send('respond with a resource');
});
router.get('/register', function(req, res, next) {
res.render('register',{
'title': 'Register'
});
});
router.get('/login', function(req, res, next) {
res.render('login',{
'title': 'Login'
});
});
router.post('/register',function(req,res,next){
//Get form values
var name=req.body.name;
var email=req.body.email;
var username=req.body.username;
var password=req.body.password;
var password2=req.body.password2;
if(req.files && req.files.profileimage){
console.log('Uploading FIle...');
//FIle Info
var profileImageOriginalName = req.files.profileimage.originalname;
var profileImageName = req.files.profileimage.name;
var profileImageMime = req.files.profileimage.mimetype;
var profileImagePath = req.files.profileimage.path;
var profileImageExt = req.files.profileimage.extension;
var profileImageSize = req.files.profileimage.size;
} else{
// Set a Default Image
var profileImageName = 'noimage.png';
}
//Form Validation
req.checkBody('name','Name field is required').notEmpty();
req.checkBody('email','Email field is required').notEmpty();
req.checkBody('email','Email not valid').isEmail();
req.checkBody('username','Username field is required').notEmpty();
req.checkBody('password','password field is required').notEmpty();
req.checkBody('password2','passwords do not match').equals(req.body.password);
//Check for errors
var errors = req.validationErrors();
if(errors){
res.render('register',{
errors:errors,
name:name,
email:email,
username:username,
password:password,
password2:password2
});
}
else{
var newUser = new User({
name:name,
email:email,
username:username,
password:password,
profileimage:profileImageName
});
//Create User
User.createUser(newUser, function(err,user){
if(err) throw err;
console.log(user);
});
//Success Messsage
req.flash('success','You are now registered and may log in');
res.location('/');
res.redirect('/');
}
});
module.exports = router;
在view文件夹中注册.jade
extends layout
block content
h1 Register
p Please Register using the form below
ul.errors
if errors
each error, i in errors
li.alert.alert-danger #{error.msg}
form(method='post',action='/users/register',enctype='multipart/form-data')
.form-group
label Name
input.form-control(name='name', type='text',placeholder='Enter Name')
.form-group
label Email
input.form-control(name='email', type='email',placeholder='Enter Email')
.form-group
label Username
input.form-control(name='username', type='text',placeholder='User Name')
.form-group
label Password
input.form-control(name='password', type='password',placeholder='Enter Password')
.form-group
label Confirm Password
input.form-control(name='password2', type='password',placeholder='Confirm Password')
.form-group
label Profile Image
input.form-control(name='profileimage', type='file')
input.btn.btn-default(name='submit',type='submit',value='Register')
截图：
