Not all the comments visible when pulling a post using Facebook graph API iphone

Question

I searched through all the posts about Facebook graph API and didn\'t find anything about it. Here\'s the issue.

I\'m working on the iPhone app for one company. And for

Answer 1

Furthermore, the number of comments is sometimes different in /feed then in /post_id/comments

For instance :

graph.facebook.com/146154582080623/feed returns 1 comment with a count of 3

and

graph.facebook.com/146154582080623_184735008222580/comments (which is a post of the previous page) returns 2 comments

So I'm wondering if privacy is the problem or not.

Answer 2

Just wanted to add this works: Grab the feed for all the basic wall post information, then grab the comments for each post individually. Requires more complex refresh methods, and a little trickery (trust your comments array over the JSON comment count number where you can) but at least it gets it right.

I was grabbing the feed to get post_id's, then grabbing each post individually to get the correct information. However, just 2 days ago I had some really funny stuff going on where the same facebook post request in iOS would return 2 of the 3 comments, the Chrome browser returned 1 comment (the latest one) and the request in Firefox returned the other 2 comments but not the newest one. Didn't matter if I was logged in or not when using the browser to test the response. This happened for about half the posts with comments.

So I tried using the access token in the URLs on the Facebook Developers site and changing the request to this particular post - returned all the correct information straight away! It got to the point where I even created a new Facebook App to get a new app ID, and a fresh project in XCode to eliminate all possibilities - didn't make a difference.

So thanks to this thread I tried the {post_id}/comments GET, and it works correctly. I've done the same thing for likes to eliminate that potentially breaking further down the line as well!

Answer 3

The Graph API works in mysterious ways and there's a countless number of bugs actually open, but to make it simple you'll need to pass a valid access_token to retrieve all comments from facebook.

Meaning https://graph.facebook.com/page_id/feed?access_token=blah

The API will return a JSON with links to use the pagination. You can use them to browse through or retrieve directly a larger amount of data:

https://graph.facebook.com/page_id/feed?access_token=blah&limit=1000

Note that using a limit higher than 1000 will lead to bugs and possible invalid data... that's a known bug. There are also bugs in the pagination logic that might or might not be fixed as of 2011... you'll have to check.

The comments count and actual count is also buggy and might be off when working on large pages (seen it happen on pages with more than 5k comments per post). There are also some problems with getting the count itself...

Sorry if I can't help you more than that, but the graph API is still a bit of a mess and counts a fairly high number of bugs. You'll have to try and see if it works as explained in the documentation. But definitively add an access token, it can't hurt and you'll most likely get the data you want... unless you run into a bug.