Allow IDs matching a certain hashtag to be returned by type.
Allow IDs matching a certain hashtag to be returned by type.

This change avoids an N+1 problem when hashtags are returned with #hashtaggables.

ralovely/simple_hashtag,scy0846/supertag,alex-pol/simple_hashtag,alex-pol/simple_hashtag,ralovely/simple_hashtag,alex-pol/simple_hashtag,scy0846/supertag