Removing specific items from array with MongoDB

Question

I am developing a web app using Codeigniter and MongoDB. The users can upload files and other users can comment on them.

I store the comments in an array called comm

Answer 1

maybe you can remove comment by its 'created_at' time, as the time is unique.

$db.coll.update({cond to identify document},{$pull:{'comments':{'created_at':<>}}})