mbleigh/acts-as-taggable-on — pull request #584 by dontfidget (2014-08-29 17:40:05+00:00)
Title: fetch ids without instantiating records when pluck is available

Not only is pluck more efficient for fetching ids, but instantiating a record with only an id can cause problems isfthere are after_find hooks that expect to have all the columns populated. However, pluck was a rails 3.2 addition, so we have to test for it since this gem supports back to rails 3.0.0.