This is an extraction of the common user model code in our Rails apps.
class Student < ActiveRecord::Base
is_a_buckeye
endIt validates the format and uniqueness of name_n and emplid.
It sets the id of new records to emplid.to_i, and validates that the id is always emplid.to_i.
It adds a class method: search, which searches by emplid, name_n, last_name, first_name, first_name last_name, or just last_name, depending on whether the search term looks like an emplid, name_n, etc.
It adds an instance method: email, which is just "#{name_n}@osu.edu".
Just call is_a_buckeye from the class level in your model. This mixin expects emplid, name_n, first_name, and last_name to be attributes of the model in question.