I am trying to retrieve metrics post_impressions_unique, post_consumptions or anything started with a post but Facebook always return empty array for me.
Anyone know what is the problem here?
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3 Answers
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Are you sure you have the right permissions?
You need read_insight permissions to view post impressions using fql or the graph api.
Here is more information Facebook Developer Guide
MEURSAULT
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Yes I have the permission, I can view other metrics without issue such as page_views/page_stories, only those start with post_something. – Alvin Lew Dec 12 '11 at 01:54
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Make sure you pass in the entire object ID of the post. It will be of the format pageid_postid (eg. 24379523495_8924592457245) and you need to quote it in single quotes - otherwise you'll get an error about an unexpected underscore.
Mason
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As well as needing the read_insights permission, this information is only available for posts made by your page, so check you're actually checking the right posts
Igy
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yup, the object ID is correct, I can retrieve all the entries in "stream" and their impression. But when I try to retrieve post_impressions metric from insight table, it return empty array without any error. – Alvin Lew Dec 12 '11 at 01:56