Spoke to @dpickett about this and any kind of memory issues it might cause if we had a ton of `Blog` records and he said it would be safer to use `Blog.find_each` and grab the `id` of each blog. `#find_each` will grab the records in batches of 1000 so that we don't accidentally use more memory than we have. More info at http://api.rubyonrails.org/classes/ActiveRecord/Batches.html