FQL pic_cover event returns null

Question

I am trying to get the cover art for a public event on Facebook, but the pic_cover field returns null.

Here is the event: https://www.facebook.com/events/545127275518406/

Here is my FQL query: SELECT pic_cover FROM event WHERE eid=545127275518406

This query returns:

 { "data": [ { "pic_cover": null } ] } 

Another public event ( https://www.facebook.com/events/133752506800219/ ) using the same request (with eid replacement) returns:

 { "data": [ { "pic_cover": { "cover_id": 431180503630072, "source": "https://sphotos-a.xx.fbcdn.net/hphotos-ash4/299824_431180503630072_82863704_n.jpg", "offset_y": 36 } } ] } 

Why does the first event return null if it has a cover?

Answer 1

Asking the user permission for user_photos partially solves this problem. I say partly because some photos do not come back. Keep in mind that pic_cover and pic_big are two different things.