Node.js通过嵌套的Javascript对象循环
我希望有来自Facebook的帖子+附件,这样我就可以创建帖子列表。问题是我想为每个帖子提要在数组中放置属性:id、message和任何附件。我不确定是需要迭代数组中的对象,还是可以选择ID并获取相关信息 另外,我使用async.瀑布()来获取同步调用,因为我将进行依赖于上一个调用的其他调用 我尝试此操作以获取附件的id、消息和src url:Node.js通过嵌套的Javascript对象循环,javascript,node.js,javascript-objects,fb-graph,Javascript,Node.js,Javascript Objects,Fb Graph,我希望有来自Facebook的帖子+附件,这样我就可以创建帖子列表。问题是我想为每个帖子提要在数组中放置属性:id、message和任何附件。我不确定是需要迭代数组中的对象,还是可以选择ID并获取相关信息 另外,我使用async.瀑布()来获取同步调用,因为我将进行依赖于上一个调用的其他调用 我尝试此操作以获取附件的id、消息和src url: var async = require("async"); var graph = require('fbgraph'); async.waterfa
var async = require("async");
var graph = require('fbgraph');
async.waterfall([
getFeed,
getPostPicture,
], function (err, result) {
});
function getFeed(callback) {
graph.get("/.../feed" + "?fields=message,attachments&access_token=APPID|APPSECRET", function(err, res) {
callback(null, res);
});
}
function getPostPicture(arg1, callback) {
var feedData = arg1.data;
for(var i in feedData)
{
var id = feedData[i].id;
var message = feedData[i].message;
var feedAttachment = feedData[i].attachments
for (var j in feedAttachment)
{
var attachment = feedAttachment.data;
var attachmentURL = attachment[i].src;
for (var j in attachmentURL)
{
var attachmentURL = feedAttachment.src;
}
}
}
console.log(attachment);
}
以上将输出:
[ { description: 'post message 1',
media: { image: [Object] },
target:
{ id: '...',
url: 'https://www.facebook.com/.../photos/a............/.../?type=3' },
title: 'Timeline Photos',
type: 'photo',
url: 'https://www.facebook.com/.../photos/a............/.../?type=3' } ]
下面是我第一次在源代码中调用graph.get的响应
我需要{data->[message,id,attachments->data[src]]}
{
"data": [
{
"message": "post message 1",
"id": "..._...",
"attachments": {
"data": [
{
"description": "picture 1",
"media": {
"image": {
"height": 256,
"src": "https://scontent.xx.fbcdn.net/v/t1.0-9/..._..._..._n.png?oh=...&oe=...",
"width": 256
}
},
"target": {
"id": "...",
"url": "https://www.facebook.com/.../photos/a............/.../?type=3"
},
"title": "Timeline Photos",
"type": "photo",
"url": "https://www.facebook.com/.../photos/a............./..../?type=3"
}
]
}
},
{
"message": "Test status update 123",
"id": "..._..."
}
],
"paging": {
"previous": "https://graph.facebook.com/v2.8/.../feed?fields=message,attachments&format=json&since=...&access_token=...&limit=25&__paging_token=enc_...&__previous=1",
"next": "https://graph.facebook.com/v2.8/.../feed?fields=message,attachments&format=json&access_token=...&limit=25&until=...&__paging_token=enc_..."
}
}
在
getPostPicture
函数中使用for循环时,i变量实际上是数组feedData
中的元素,因此必须i.id
或i.attachments
和i.message
。我还认为,由于您在两个循环中使用相同的j
,其中一个循环嵌套在另一个循环中,因此它也不能正常工作,因此您可能也必须更改它,并用您期望的输出类型解释您的问题。那么console.log(附件)是如何工作的代码>网络输出?您确定您的代码粘贴正确吗?请展开您的代码,以便更好地显示在哪一点生成输出。