问题
The location_post FQL table is described as the following:
An FQL table that returns Posts that have locations associated with them and that satisfy at least one of the following conditions:
you were tagged in the Post
a friend was tagged in the Post
you authored the Post
a friend authored the Post
So I wrote the following FQL script with the intent of getting all posts my friends and I had made at a certain location:
SELECT id, message, post_id, timestamp FROM location_post WHERE page_id=303736809701751
However, an empty data set is returned. In this particular case, I expect some of my own posts to be returned, though I have tried other place ids that should have returned friends' posts as well.
What is missing from the request, or is this a bug I should report to Facebook?
回答1:
The paragraph you quoted from the doc just says that the table only contains places where yourself and friends of yours have been. It tries to explain that you will not find public users there.
A query to the location_post table does not automatically specify the concerned IDs for you. If you want to search for the places where all your friends have been, you will have to indicate all your friends. If you are only interested by a bunch of friends, just add the concerned IDs.
This should do it.
SELECT id, message, post_id, timestamp
FROM location_post
WHERE (author_uid IN (SELECT uid2 FROM friend WHERE uid1 = me())
OR author_uid = me()
OR tagged_uids IN (SELECT uid2 FROM friend WHERE uid1 = me())
OR tagged_uids = me())
AND page_id = 303736809701751
来源：https://stackoverflow.com/questions/17537158/facebook-fql-get-all-posts-at-location