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Contents
module Spree
module NumberGenerator
extend ActiveSupport::Concern
NUMBER_LENGTH = 9
NUMBER_LETTERS = false
NUMBER_PREFIX = 'N'
included do
before_validation :generate_number, on: :create # generate number before make_permalink
validates :number, presence: true, uniqueness: true
end
def self.by_number(number)
where(number: number)
end
def generate_number(options = {})
options[:length] ||= NUMBER_LENGTH
options[:letters] ||= NUMBER_LETTERS
options[:prefix] ||= NUMBER_PREFIX
possible = (0..9).to_a
possible += ('A'..'Z').to_a if options[:letters]
self.number ||= loop do
# Make a random number.
random = "#{options[:prefix]}#{(0...options[:length]).map { possible.shuffle.first }.join}"
# Use the random number if no other order exists with it.
if self.class.exists?(number: random)
# If over half of all possible options are taken add another digit.
options[:length] += 1 if self.class.count > (10 ** options[:length] / 2)
else
break random
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems