ruby - Rails create callback for 2 dependent resources -

i want know how can use create callback before_create or after_create 2 dependent models.

class user < activerecord::base  end  class member < activerecord::base  end 

lets suppose have 2 models called user , member , want create member whenever user created , want create user whenever member created .

if use after_create or before_create callback in both models run never ending loop .so how can done.

just check if either of association exists in db before creating in after_create callback, this:

class user < activerecord::base   after_create :create_member    private     def create_member       unless self.member?         # create member       end     end end  class member < activerecord::base   after_create :create_user    private     def create_user       unless self.user?         # create user       end     end end