json - 无法迭代 Node 、express 应用程序中的 json 对象

Question

这是我的 Jade 码

block content
    .container
        #{data} //prints the whole json doc
        p Here the list of topics will be shown
        for topic,index in data
                p #{index}#{topic.title}

“此处将显示主题列表”后显示一直到 1002 的连续索引。但没有显示索引旁边的任何数据。

这是我的 json 数据，由 #{data} 打印

[{"_id":"56cc8af53ce0def08a1fa4fa","title":"Rotational Motion","subtopics":[{"stitle":"Introduction","versions":[{"desc":"What is rotational motion?"},{"desc":"Describe it?"}]},{"stitle":"Defination","versions":[{"desc":"Define rotational motion"},{"desc":"Define Rotational motion in detail"}]},{"stitle":"Derivation","versions":[{"desc":"Define rotational motion"},{"desc":"Define Rotational motion in detail"}]}]},{"_id":"56cc71107bb2a0733aba0007","title":"Wave Motion","subtopics":[{"stitle":"Introduction","versions":[{"desc":"What is rotational motion?"},{"desc":"Describe it?"}]},{"stitle":"Defination","versions":[{"desc":"Define rotational motion"},{"desc":"Define Rotational motion in detail"}]}]},{"_id":"56c635b38aff62a82b245e20","title":"Sound and Light","subtopics":[{"stitle":"Introduction","versions":[{"desc":"What is rotational motion?"},{"desc":"Describe it?"}]},{"stitle":"Defination","versions":[{"desc":"Define rotational motion"},{"desc":"Define Rotational motion in detail"}]}]}]

这就是我渲染文件的方式 -

router.get('/', function (req, res) {
    var options = {
      host: 'someurl',
      port: 80,
      path: '/topics'
    };

    http.get(options, function(webresponse) {
      console.log("Got response: " + webresponse.statusCode);

      webresponse.on("data", function(chunk) {
        console.log("data: " + chunk);
        var data = chunk; 
        console.log(data); //prints the json data correctly
        //rendering html with params
        res.render('index', { user : req.user , data : data });

      });
    }).on('error', function(e) {
      console.log("Got error: " + e.message);
    });
});

Answer 1

Jade 使用 each 而不是 for。将您的代码更新为数据中的每个主题，它应该可以正常工作。

Jade Docs

编辑:根据您的服务器代码，data 似乎只是一个以字符串形式返回的 JSON 对象，这就是您无法正确循环它的原因。在将 JSON.parse(data) 发送到渲染器之前使用 JSON.parse(data) 应该可以解决该问题