Ordering an array in Ruby using 2 sorting criterias

ordering.rb

# Ordering a list by field1 in descending order. If two elements have the same value, order by field2 in ascending order

list.sort do |a, b|
  comp = (b.field1 <=> a.field2)
  comp.zero? ? (a.field2 <=> b.field2) : comp
end