i always worry if myown active_record callback conflicts with rails'
implemented corresponding one.i assume rails itself perhaps also use
active_record callback.for example:
class Book < ActiveRecord::Base
when i define the after_save for Book,i think perhaps this after_save
has overrided rails itself's implemented one,if so,i want to use both of
is my consideration right?
does rails use active_record callbacks? if it is true,how do i take care
of myown's and rails'.