Merge pull request #1086 from travis-ci/ce-tweak-jobs-query

Speed up jobs queries/endpoint

This updates API to use the optimized database functions added in travis-ci/travis-migrations#222.

Author: clekstro

lib/travis/api/v3/queries/jobs.rb

@@ -13,8 +13,6 @@ def find(build)
     end
 
     def filter(relation)
-      relation = relation.where(state: ACTIVE_STATES) if bool(active)
-      relation = relation.where(state: list(state))   if state
       relation = for_owner(relation)                  if created_by
 
       relation = relation.includes(:build)
@@ -36,8 +34,7 @@ def for_owner(relation)
 
     def for_user(user)
       set_custom_timeout(host_timeout)
-      fragment = "SELECT repository_id FROM permissions where user_id = #{user.id}"
-      jobs = V3::Models::Job.where("EXISTS (#{fragment}) AND jobs.repository_id IN (#{fragment})")
+      jobs = V3::Models::Job.where("jobs.id in (select id from most_recent_job_ids_for_user_repositories_by_states(#{user.id}, ?))", states)
 
       sort filter(jobs)
     end
@@ -48,5 +45,15 @@ def stats_by_queue(queue)
                                           .count
       Models::JobsStats.new(stats, queue)
     end
+
+    private
+
+    def states
+      s = []
+      s << ACTIVE_STATES if bool(active)
+      s << list(state) if state
+      return '' if s.empty?
+      s.flatten.uniq.join(',')
+    end
   end
 end