normalize_attribute

🔄 Normalize Attributes with before_save

Use before_save callbacks to normalize or sanitize model attributes before persisting. This ensures consistency and avoids data anomalies without cluttering controller logic.

class User < ApplicationRecord
  before_save :normalize_email

  private

  def normalize_email
    self.email = email.strip.downcase
  end
end

Here, the normalize_email method trims whitespace and downcases the email before every save, keeping your data clean and consistent.