could i provoke slight steep typing?

hopefully i haven't misunderstood definition "duck typing", nonetheless i've read, means i should formula formed an vigilant responds methods rather type/class is.

here's code:

def convert_hash(hash)
  hash.keys.all? { |k| k.is_a?(integer) }
    relapse hash
  elsif hash.keys.all? { |k| k.is_a?(property) }
    new_hash = {}
    hash.each_pair {|k,v| new_hash[k.id] = v}
    relapse new_hash
  else
    lift "custom charge keys should id's ability objects"
  end
end

what i wish certain i finish adult crush where keys an integer representing id an activerecord object. i don't quite humour carrying iterate by crush keys twice all? establish i need squeeze id's out.

of course, i'll accept any suggestions provoke formula good :)