Fix #322

Author: root

Diff for: app/reports/repository_contributors_stats.rb

@@ -70,7 +70,7 @@ def commits_per_author_with_aliases
       # registered_committers = [ committer,... ]
       registered_committers = []
       user_committer_mapping = {}
-      Changeset.where(repository_id: repository.id).where('user_id IS NOT NULL').group(:committer).includes(:user).each do |x|
+      Changeset.select('changesets.committer, changesets.user_id').where('repository_id = ? and user_id IS NOT NULL', repository.id).group(:committer, :user_id).each do |x|
         name = "#{x.user.firstname} #{x.user.lastname}"
         registered_committers << x.committer
         user_committer_mapping[[name, x.user.mail]] ||= []