如何在玉器中渲染json对象并遍历结果

Question

当我将JSON字符串发送到jade文件进行出租时，我只能完整地打印出该字符串，而不能按其元素打印出来。如何打印特定元素或遍历JSON字符串？

app.js：

var http    = require('http'), 
    express = require('express'),
    net     = require('net');

var app = express();

app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.logger('dev'));
app.use(express.static(__dirname + '/public'));

app.get('/', function (req, res) {
    var json_string = {"action":"date +%s","result":"1367263074"};
    res.render('index', { layout : 'layout', json: JSON.stringify(json_string) });
})
app.listen(3000);

layout.jade：

!!!5
html
 head
  body
   p !{json}
   p !{json.result}
   p ---
    each val, key in json
     p #{key}: #{val}

预期输出：

{"action":"date +%s","result":"1367263074"}
1367263074
---
action: date +%s
result: 1367263074

实际输出：

{"action":"date +%s","result":"1367263074"}

---
0: {
1: "
2: a
3: c
4: t
5: i
6: o
7: n
8: "
9: :
10: "
11: d
12: a
13: t
14: e
15:
16: +
17: %
18: s
19: "
20: ,
21: "
22: r
23: e
24: s
25: u
26: l
27: t
28: "
29: :
30: "
31: 1
32: 3
33: 6
34: 7
35: 2
36: 6
37: 3
38: 0
39: 7
40: 4
41: "
42: }

Answer 1

你为什么要传递一个字符串？试试这个：

var ob = { action:"date +%s", result:"1367263074"};
res.render('index', { layout : 'layout', json: ob });

或执行以下操作：

-var ob = JSON.parse(json)
-for(var prop in ob)
 p #{prop}: #{ob[prop]}