minor cleanup, using AR querying DSL over raw SQL in some places

app/models/draft_sequence.rb

@@ -2,7 +2,7 @@ class DraftSequence < ActiveRecord::Base
   def self.next!(user,key)
     user_id = user
     user_id = user.id unless user.class == Fixnum
-    h = {user_id: user_id, draft_key: key}
+    h = { user_id: user_id, draft_key: key }
     c = DraftSequence.where(h).first
     c ||= DraftSequence.new(h)
     c.sequence ||= 0
@@ -20,10 +20,6 @@ class DraftSequence < ActiveRecord::Base
     # perf critical path
     r = exec_sql('select sequence from draft_sequences where user_id = ? and draft_key = ?', user_id, key).values
 
-    if r.length == 0
-      0
-    else
-      r[0][0].to_i
-    end
+    r.length.zero? ? 0 : r[0][0].to_i
   end
 end