goddamnyouryan/coven-api — pull request #2 by antstorm (2014-12-14 19:59:09+00:00)
Title: Add missing indexes to posts

I noticed missing indexes on *posts* and added them:

`url` — unique index that is used on every post creation, since there's a uniqueness validation
`:source, :position` — when posts are fetch they are sorted by position, and sometimes filtered by source, combined index ensures both requests will use this index