我编写了一个脚本,使用mongoose将对象保存到MongoDB数据库。该对象正确保存到数据库,但服务器崩溃后,给我发出以下错误消息:catch(err) { process.nextTick(function() { throw err}); }
以下是我的代码的一部分:
users.js
var User = require('../models/user');
router.post('/register', function(req, res, next) {
[...]
// checks for errors
var errors = req.validationErrors();
if (errors) {
res.render('register', {
errors: errors,
[...]
})
} else {
var newUser = new User({
[...]
});
// Create user
User.createUser(newUser, function(err, user) {
if (error) {
throw err;
};
console.log(user);
});
[...]
}
});
module.exports = router;
user.js的
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/nodeauth');
// User Schema
var UserSchema = mongoose.Schema({
[...]
});
var User = module.exports = mongoose.model('User', UserSchema);
module.exports.createUser = function(newUser, callback) {
newUser.save(callback);
}
apps.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
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 expressValidator = require('express-validator');
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');
// handle file uploads
app.use(multer({dest:'./uploads'}).single('singleInputFileName'));
// 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 session
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')));
// connect flash
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;
答案 0 :(得分:0)
你不应该抛出错误,你应该在处理程序中返回它,让客户知道创建用户时是否存在数据库错误。只有当调用者可以捕获错误时才抛出,异步代码无法轻易捕获。 Promise允许抛出错误但不能回调。