show database indexes in rails

show_indexes.rb

ActiveRecord::Base.connection.tables.each do |table|
 indexes = ActiveRecord::Base.connection.indexes(table)
 if indexes.length > 0
   puts "====>  #{table} <===="
   indexes.each do |ind|
     puts "----> #{ind.name}"
   end
   puts "====>  #{table} <===="
   2.times{ puts ''}
 end
end