Question

在我的Node.JS Express应用程序中更新用户（通过数据库更新）时，我更新了一个用户会话，然后更新res.locals.session

但是，当我尝试访问Jade模板中的res.locals.session时，这些值将显示为数据库更新之前的值。

请您帮我解一下为什么res.locals.session没有在模板中更新？

这是我的代码（为简洁而减少）：

index.js

// Store session to locals so I can use it in Jade
app.use(function (req, res, next) {
    res.locals.session = req.session;
    next();
});

路由/ user.js的

var User = require('../models/Users');

function displaySettings(req, res) {
    res.render('settings');
}

function saveSettings(User, req, res) {

    // Updating user

    User.update(
        { Member_id: req.session.user.Member_id }
        , { settings: req.body }
        , { upsert: false, multi: false }
        , function (err) {
            //if(err) return next(err);
            //res.json({ message : 'Success!'});
            console.log("saved");
        });

    // Retrieving user again, so that I can resave the updated user's details
    // in the res.locals.session 

    var user = User.findById(req.session.user._id, function (err, user) {
        console.log("found");
        console.log(user);
        req.session.user = user;
        console.log(req.session.user);
        res.locals.session = req.session;
        console.log(res.locals.session);
    });

    // Finally display the view

    displaySettings(req, res);
}

视图/ settings.jade

extends layout

block content

    include includes/navigation

    div.container.main

        h1.text-center User Settings

        div.row
            div.col-md-6.col-md-offset-3

                form#form-login.form-horizontal(action='/settings',method='post')
                    div#container(data-role='fieldcontain')
                        fieldset(data-role='controlgroup')
                            div.form-group
                                label.col-sm-4.control-label(for='username') Paypal Email
                                div.col-sm-8

                                // The session.user.settings.paypalEmail is showing 
                                // the old value even after the user has re-saved 
                                // their settings. I'm expecting the new, updated 
                                // value to be displayed instead

                                    input.form-control(id='username',type='text',value='#{session.user.settings.paypalEmail}',name='paypalEmail')

Answer 1

尝试使用res.redirect('settings')而不是调用displaySettings(req, res)。我认为这将允许res.locals更新。

Answer 2

如何重写saveSettings如下。

function saveSettings(User, req, res) {

    // Updating user

    User.update(
        { Member_id: req.session.user.Member_id }
        , { settings: req.body }
        , { upsert: false, multi: false }
        , function (err) {
            //if(err) return next(err);
            //res.json({ message : 'Success!'});
            console.log("saved");

     // Retrieving user again, so that I can resave the updated user's details
    // in the res.locals.session 

    var user = User.findById(req.session.user._id, function (err, user) {
        console.log("found");
        console.log(user);
        req.session.user = user;
        console.log(req.session.user);
        res.locals.session = req.session;
        console.log(res.locals.session);
        // Finally display the view

        displaySettings(req, res);
    });


        });


}

尝试在数据库更新后更新res.locals

2 个答案: