Is there any way to get the exception

Here is tow model:

class Morder < ActiveRecord::Base
has_many :morderlists
end

class Morderlist < ActiveRecord::Base
belongs_to :morder

def validate
  #some validate
end
end

And the method in controller :

class MorderController < ApplicationController
def create
  morder=Morder.new(:code=>'001')
  morderlist1=Morderlist.new
  morderlist2=Morderlist.new
  morder.morderlists << [morderlist1,morderlist2]
  morder.save!
end
end

If the morderlist1 or morderlist2 is not correct,I just get the errors
like 'morderlist invalid".Is there any way to get the detail
information?

morderlist.errors