How can I retrieve the list of Facebook users that have clicked the like button on an external site?
Say I have a like button:
<fb:like href="http://example.com/xyz"></fb:like>
I'd like a list of FB user IDs of people who have liked it.
I've tried OpenGraph:
https://graph.facebook.com/OBJECTID/likes/
(where OBJECTID is the id of the like example.com/xyz)
and FQL
select user_id from like where object_id in (
select id from object_url where url = 'http://example.com/xyz'))
but both return empty results.
I can see from other calls that the likes are counted alright, but I can't get the actual users.
Anyone know what permissions etc. I'd need to retrieve these?
Also see this question for sample code.