嗨，大家好我正在学习一个看起来过时的Multer Middleware教程。
首先我遇到了一些问题，它在consol中崩溃但是我通过将文件替换为var upload = multer（{dest：'。/ uploads'}）;来解决这个问题。
但是当我在提交字段Issue Image时尝试注册用户时，我遇到了问题。虽然我遵循的教程只是注册用户的进展。
IN 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 flash = require('connect-flash');
var mongo = require('mongodb');
var mongoose = require('mongoose');
var db = mongoose.connection;
var routes = 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');
app.set('view cache', false);
// Handle file uploads
var upload = multer({ dest: './uploads' });
// 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 Should be after express middleware
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('/', routes);
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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
In user.js
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');
});
/* GET users listing. */
router.get('/register', function(req, res, next) {
res.render('register',{
'title': 'Register'
});
});
/* GET users listing. */
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;
//Check for image Field
if(req.file){
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','Password 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 Message
req.flash('success','You are now registered and may login');
res.location('/');
res.redirect('/');
}
});
module.exports = router;
//users/register go here
in user js in models
var mongoose = require('mongoose');
var db = mongoose.connection;
// User schema
// User Schema
var UserSchema = mongoose.Schema({
username: {
type: String,
index: true
},
password: {
type: String
},
email: {
type: String
},
name: {
type: String
},
profileimage: {
type: String
}
});
var User = module.exports = mongoose.model('User', UserSchema);
module.exports.createUser = function(newUser,callback){
newUser.save(callback);
};
routes index.js
var express = require('express');
var router = express.Router();
/* GET home page. */
router.get('/', function(req, res, next) {
res.render('index', { title: 'Members' });
});
module.exports = router;
答案 0 :(得分：0)
也许您在错误的地方定义验证器。 来自docs https://github.com/ctavan/express-validator。
app.use(expressValidator([options])); // this line must be immediately after express.bodyParser()!
另请检查您在/ register
中收到的自定义验证代码和数据希望这有帮助。
答案 1 :(得分：0)
所以我经过多次尝试和错误后解决了这个问题。我认为multer只在app.js中需要，但我在 users.js 中添加了以下几行。我认为只有在app.js中才需要它。
首先我添加了
A
然后我改变了（也在 users.js
var multer = require('multer');
var uploads = multer({dest: './uploads'});
这一切都奏效了。但我想知道是否有人可以解释为什么在users.js中需要这个，而不仅仅是app.js.考虑为初学者解释它。