Expose the most and least number of conflicts

app/models/conflicts_for_talk.rb

@@ -1,2 +1,9 @@
 class ConflictsForTalk < ApplicationRecord
+  def self.most
+    first
+  end
+
+  def self.least
+    last
+  end
 end

app/models/summary.rb

@@ -9,6 +9,14 @@ class Summary
                                          .uniq.count
   end
 
+  def most_conflicts
+    ConflictsForTalk.where(talk_id: talk_ids).most.conflicts
+  end
+
+  def least_conflicts
+    ConflictsForTalk.where(talk_id: talk_ids).least.conflicts
+  end
+
   def ranking
     @ranking ||= Ranking.new(talk_ids: talk_ids).ranking
   end

app/views/summaries/show.json.jbuilder

@@ -1 +1 @@
-json.extract! @summary, :number_of_ballots, :ranking
+json.extract! @summary, :number_of_ballots, :most_conflicts, :least_conflicts, :ranking