Get flickr photoset id from photo id

Hey, i have now used my whole day on finding out how to get other photo's in the same set as the photo is in. I do know the Photo ID but i can't find an me开发者_运维百科thod to find the photosets it apears in..

I'm using Rails 3, with a gem called "Flickraw"

i don't get it as a output for the getInfo on photos.

Thanks!

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flickr.photos.getAllContexts