[RUBY] Normalize Rails values

Value normalization

Converting information to follow certain rules is called legitimate. This time, if the value entered as Frigana is Hiragana, normalize it. Let's try normalization to make it katakana.

First, create a normalizer in the app / models / concerts directory.

string_normalizer.rb

require "nkf"

module StringNormalizer
  def normalize_as_furigana(text)
    NKF.nkf("-W -w -Z1 --katakana", text).strip if text
end

The code below does the actual normalization.

NKF.nkf("-W -w -Z1 --katakana", text).strip if text

The arguments specified have the following meanings:

** NKF # nkf method arguments **

You are now ready. After that, let's install the module on the model side

model.rb

class UserController < ApplicationRecord
  include StringNormalizer

  before_validation do
    self.name_kana = normalize_as_furigana(name_kana)
  end

Attribute specified by name_kana before passing validation like this I was able to normalize to Hiragana-> Katakana.

That's all for today! !!