Use query to filter by keys when grouping #34

Merged
merged 1 commit into from Apr 4, 2013
Commits on Apr 3, 2013
  1. Use query to filter by keys when grouping

    robyoung committed Apr 3, 2013
    Rather than filtering out results that have null values for keys
    after the group handle it in the condition. This let's Mongo do the hard
    work so we don't have to.