如何在Express.pars中使用app.get内的app.locals [英] how to use app.locals inside app.get in express and parse
问题描述
我正在使用Express开发解析应用程序.我有一个索引文件,该文件显示登录用户和公共用户的相同信息,但登录公共用户和注销登录用户的信息除外.我正在使用app.locals来存储标志和登录的用户名,但是还有些不被保存的方式. 我的app.js代码是
I am working on a parse application using express. I have an index file which shows the same information to the logged in users and public users except a login to public users and logout to logged in users. I am using app.locals to store a flag and logged-in user name but some how they are not getting stored. My code for app.js is
// The homepage renders differently depending on whether user is logged in.
app.get('/', function(req, res) {
if(Parse.User.current()){
Parse.User.current().fetch().then(function(user) {
// Render the user profile information (e.g. email, phone, etc).
name = user.get('username');
});
app.locals({flag :true,name:name});
}else{
app.locals({flag:false, name:''});
}
// Render a public welcome page, with a link to the '/' endpoint.
var ProfessionalUsers = Parse.Object.extend("User");
var query = new Parse.Query(ProfessionalUsers);
query.limit(50);
query.equalTo("usertype", "Professional");
query.find().then(function(profs) {
res.render('index', {
title: "Popular Experts",
profs: profs,
});
});
});
我在索引中编写的代码
<div class='navigation'>
<ul class='navigation-ul'>
<li><a href='/' class='search' id='searchLink' >Search</a></li>
<% if(flag){ %>
<li><a href='/dashboard' class='dashboard' id='dashboardLink' >Dashboard</a></li>
<% } %>
<li><a href='/howitworks' class='how-it-works' id='howItWorksLink'>How it Works</a></li>
<li><a href='/testimonials' class='testimonials' id='testimonialsLink' >Testimonials</a></li>
<li><a href='/faqs' class='faqs' id='faqsLink'>FAQs</a></li>
<% if(flag){ %>
<li><a href='/logout' class='logout' id='logoutLink'>Logout<span class='username'>(<%= name ? name : '' %>)</span></a></li>
<% }else{ %>
<li><a href='/login' class='login-signup' id='navLoginSignupLink'>Login/Signup</a></li>
<% } %>
</ul>
</div>
显示专业人员的代码
<p><%= title %></p>
<div class='professionals'>
<% for(var i=0;i<profs.length;i++) { %>
<div class='professional'>
<div class='picture-space' onclick = 'location.href = "/user/<%= profs[i].id %>"' style='cursor:pointer'>
<img src='images/default.jpg'/>
</div>
<div class='name-space'><%= profs[i].attributes.username %></div>
<div class='service-space'><%= profs[i].attributes.servicetype %></div>
<div class='linkedin-space'><a href='http://<%= profs[i].attributes.linkedin %>' target='_blank'>Linkedin Profile</a></div>
</div>
<% } %>
</div>
这是我为解决此问题所做的
This is what I have done to fix this
// The homepage renders differently depending on whether user is logged in.
app.get('/', function(req, res) {
// Render a public welcome page, with a link to the '/' endpoint.
var ProfessionalUsers = Parse.Object.extend("User");
var query = new Parse.Query(ProfessionalUsers);
query.limit(50);
query.equalTo("usertype", "Professional");
query.find().then(function(profs) {
var user = Parse.User.current();
if(user){
user.fetch().then(function(user,error) {
res.render('index',{user:user.toJSON(),profs:profs,title:'Popular Experts'});
});
}else{
res.render('index', {
title: "Popular Experts",
profs: profs,
user:''
});
}
});
});
推荐答案
app.locals无权访问req,res对象.它用于不随请求而变化的非动态数据(如应用程序名称或类似名称).我相信您所追求的是 res.locals (( http://expressjs .com/api.html#res.locals )
app.locals doesn't have access to the req, res objects. It is intended for non-dynamic data that doesn't change per request (like app-name, or something similar). I believe what you are after is res.locals (http://expressjs.com/api.html#res.locals)
我建议添加一些可以满足您需求的中间件.
I would suggest adding some middleware that does what you want.
您可以只为您的路线加载它.这将在执行您在该路由处定义的功能之前执行中间件RIGHT:
You could load it just for your route. This will execute the middleware RIGHT before it executes the function you defined at that route:
function getUserInfo(req, res, next) {
var user_name = "adam"; //make some call here to get the user data
//make 'user_name' variable available in the view
res.locals.user_name = user_name;
next(); //go to the next 'middleware', which is the stuff you defined.
}
//add getUserInfo here as middleware that will run on the '/' route BEFORE your middleware runs. Yours will be executed when 'next()' is called from the middleware function.
app.get('/', getUserInfo, function(req, res) {
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