Question

I know how to get the most recent comments for a Facebook object via FQL:

SELECT id, fromid, text, time, likes, user_likes FROM comment
WHERE object_id = [FB_OBJ_ID] ORDER BY time DESC LIMIT 25

How do I make subsequent requests to get the previous (older) batch of entries when the user clicks a button, so that every time the user asks for it I fetch the next batch of older posts. Ideally I can use the same query on every call with only an offset changing.

I’m familiar with offset and limit for the Graph API but can figure out how to use it in FQL to iterate backwards in time.

Answer 1

Add OFFSET [(LIMIT_NO * n)+1] to the end of your query, where LIMIT_NO is the number you are using in your LIMIT and n is the number of pages back you wish to go.

So to get the next 25 results, your query becomes

SELECT id, fromid, text, time, likes, user_likes FROM comment
WHERE object_id = [FB_OBJ_ID] ORDER BY time DESC LIMIT 25 OFFSET 26