javascript 在 node.js 中将数组传递给 jade 模板时遇到问题
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Having problems with passing array to jade template in node.js
提问by Patryk
I am trying to pass array of news to display on the screen but I somehow am getting empty array in the result in the browser
我试图传递新闻数组以显示在屏幕上，但不知何故我在浏览器的结果中得到了空数组
routes/rss.js
路线/rss.js
...
var news = [];
...
var this_news = {
'title': item.title,
'description': item.description
}
news.push(this_news);
...
res.render('rss', {
title: 'Node.js based RSS reader',
newsi: JSON.stringify(news)
});
views/rss.jade
意见/rss.jade
extends layout
block content
h1= title
p Welcome to #{title}
p Sure why not
script(type='text/javascript').
var inews = !{newsi};
EDIT
编辑
Ok so I have come to the conclusion that the problem lies with my 'non-callback logic'
好的，所以我得出的结论是问题出在我的“非回调逻辑”上
that's my code :
那是我的代码：
var FeedParser = require(__dirname + '/../node_modules/feedparser')
, request = require(__dirname + '/../node_modules/request');
exports.news = function(req, res){
var news = [];
request('http://feeds.feedburner.com/niebezpiecznik/')
.pipe(new FeedParser())
.on('error', function(error) {
//...
})
.on('meta', function (meta) {
console.log('===== %s =====', meta.title);
console.log('**** %s ****', meta.description);
console.log();
})
.on('readable', function() {
var stream = this, item;
while (item = stream.read()) {
var this_news = {
'title': item.title,
'description': item.description
}
news.push(this_news);
}
res.render('rss', {
title: 'Node.js based RSS reader',
newsi: JSON.stringify(news)
});
});
};
It almost works but there it gets me unhandled exception. How should I handle this ?
它几乎可以工作，但它让我遇到了未处理的异常。我该如何处理？
回答by Andrew Lively
You can just pass it as an array, you don't need to stringify it when you are rendering. Then on your jade side you can just use for & eachif you are only wanting to loop through.
您可以将其作为数组传递，渲染时无需对其进行字符串化。然后在你的翡翠方面，如果你只想循环，你可以只使用for & each。
To get it to pass as an object to a scriptthough you use an exclamation mark with single quotes then parse your object so you can use it. If you are going to pass it as an object to a script however and not use Jade's built-in iterating then you will need to stringify on your rss.js.
为了让它作为对象传递给 a ，script尽管您使用带单引号的感叹号然后解析您的对象以便您可以使用它。但是，如果您要将它作为对象传递给脚本而不使用 Jade 的内置迭代，那么您将需要在rss.js.
routes/rss.js
路线/rss.js
...
var news = [];
...
var this_news = {
'title': item.title,
'description': item.description
}
news.push(this_news);
...
res.render('rss', {
title: 'Node.js based RSS reader',
newsi: JSON.stringify(news)
});
views/rss.jade
意见/rss.jade
extends layout
block content
h1= title
p Welcome to #{title}
p Sure why not
script(type='text/javascript').
// Pass as regular array here
var inews = JSON.parse('!{newsi}');
console.log(inews);
