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使用since updated_time参数进行Facebook Graph API搜索

[英]Facebook Graph API search using since updated_time parameter

原文 2015-06-13 11:25:06 5 2 facebook/ facebook-graph-api

I am using the Facebook Graph API in Python. 我在Python中使用Facebook Graph API。 Every post has two datetimes: 每个帖子都有两个日期时间：

created_date
updated_date

When I am providing the since parameter, it is returning feeds where the created_date is greater than or equal to the since parameter. 当我提供since参数时，它返回的feed其中created_date大于或等于since参数。 For example, if I provide since=2015-06-05 then it will return all the posts from 5th June, 2015 to now. 例如，如果我提供since=2015-06-05它将返回从2015年6月5日到现在的所有帖子。

But suppose there is a post that was posted on 7th June, 2015 and few activities (likes, shares, comments, etc.) that happened on 8th June, 2015. In this scenario the updated_time of that post changes but created_time will be the same (7th June, 2015). 但是假设有一个帖子在2015年6月7日发布，并且在2015年6月8日发生了很少的活动（喜欢，分享，评论等）。在这种情况下，该帖子的updated_time发生了变化，但created_time将是相同的（2015年6月7日）。 If I pass parameter since=2015-06-08 , then I won't be able to track all of the activity on that post. 如果我since=2015-06-08传递参数，那么我将无法跟踪该帖子上的所有活动。

Is there any solution by which I can pass the since parameter on updated_time instead of passing it to created_time ? 是否有任何解决方案可以通过updated_time传递since参数而不是将其传递给created_time ？

2 个解决方案

As @CBroe points out, this isn't supported by the Facebook Graph API. 正如@CBroe指出的那样，Facebook Graph API不支持这一点。 (It can be done using FQL , but that's deprecated and won't be supported for much longer). （它可以使用FQL完成，但是已经弃用，并且不再支持更长时间）。

That said, with some creativity (and a bit extra code) a similar effect can be achieved by combining a couple of queries. 也就是说，通过一些创造力（以及一些额外的代码），可以通过组合几个查询来实现类似的效果。

In my application, I perform a query with the following parameters: 在我的应用程序中，我使用以下参数执行查询：

until=2015-07-07 (or whatever the since date would have been) until=2015-07-07 （或者since任何日期）
fields=updated_time (to keep the query fast and the payload small) fields=updated_time （保持查询快速，有效负载小）
limit=5000 (or some similarly large page size, as I'm only grabbing one field) limit=5000 （或者一些类似的大页面大小，因为我只抓取一个字段）

I then evaluate each post that has an updated_time greater than the would-be since date, and throw those posts into a queue to download the entirety of the post content. 然后，我评估每个帖子的updated_time大于since日期since预期，并将这些帖子放入队列以下载整个帖子内容。

Note: If you're dealing with content where there are frequent updates on past content, you'd likely want to use the Graph API's Batch Requests feature , as opposed to downloading each post individually. 注意：如果您正在处理过去内容频繁更新的内容，您可能希望使用Graph API的批量请求功能，而不是单独下载每个帖子。

So, for example, if the until (and, thus, since ) date is 2015-07-07 and the updated_time on a post is 2015-10-15 , then I know that post was created prior to 2015-07-07 but updated afterwards. 因此，举例来说，如果until （并且因此， since ）日期是2015-07-07并且帖子上的updated_time是2015-10-15 ，那么我知道该帖子是在2015-07-07之前创建的，但是之后更新。 It won't get picked up in a since query, but I can easily download it individually to synchronize my cache. 它不会在since查询中被提取，但我可以轻松地单独下载它以同步我的缓存。

If the aim of your application is to react to changes on a given page or feed, consider using Webhooks instead of manually crawling the page for updates. 如果您的应用程序的目标是对给定页面或订阅源上的更改做出反应，请考虑使用Webhooks而不是手动抓取页面以进行更新。

Webhooks allows you to receive real-time HTTP notifications of changes to specific objects in the Facebook Social Graph. Webhooks允许您接收Facebook社交图中特定对象更改的实时HTTP通知。