Hi,
I'm thinking about a method that responds true or false for the changes of
attributes from a value to another to trace a little bit the status of an
AR object.
Ex.
class Book < ActiveRecord::Base
STATUS_DELIVER = [0,1]
before_save :send_mail_to_customer
def send_mail_to_customer
UserMailer.send_mail_to_customer if self.changes['status'] == [0, 1]
end
end
It' a simple case but when complexity grows up a method like
def send_mail_to_customer
UserMailer.send_mail_to_customer if self.status.changes(from: 0, to: 1)
end
Maybe is more mantenible and readable.
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