Created
July 24, 2014 19:49
-
-
Save clemens/ef74f4cae46743257f21 to your computer and use it in GitHub Desktop.
invoice number generation per year
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class Invoice < ActiveRecord::Base | |
before_validation :generate_number, on: :create | |
private | |
def generate_number | |
prefix = "R#{Date.today.strftime('%y')}-" | |
last_order_number_this_year = self.class.where("number LIKE ?", "#{prefix}%").order("number DESC").limit(1).pluck(:number).first | |
number = last_order_number_this_year ? last_order_number_this_year.match(/\A#{prefix}(\d+)\z/)[1].to_i : 0 | |
self.number = "#{prefix}#{sprintf('%05d', number + 1)}" | |
end | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment