從模型訪問屬性？

Question

我有模型 「書」，和列：title，permalink，authorname，description：

before_save :change_permalink 
before_update :change_permalink 

private 

    def change_permalink 
    self.permalink = operation_with_title(title) 
    end 

    def operation_with_title(string) 
    mytitle = string.downcase! 
    mytitle.delete!(".,?!()@#\$&*^%-+=/[]{}<>`~''\"") 
    new_string = [] 
    mytitle.each_char do |c| 
     if translit.key? c 
     new_string << translit[c] 
     else 
     new_string << c 
     end 
    end 
    new_string.to_s 
    end 

    def translit 
    { 
     "а" => "a", "б" => "b", "в" => "v", 
     "г" => "g", "д" => "d", "е" => "e", 
     "ё" => "jo", "ж" => "zh", "з" => "z", 
     "и" => "i", "й" => "ij", "к" => "k", 
     "л" => "l", "м" => "m", "н" => "n", 
     "о" => "o", "п" => "p", "р" => "r", 
     "с" => "s", "т" => "t", "у" => "u", 
     "ф" => "f", "х" => "h", "ц" => "c", 
     "ч" => "ch", "ш" => "sh", "щ" => "xh", 
     "ь" => "", "ы" => "y", "ъ" => "", 
     "э" => "je", "ю" => "ju", "я" => "ja", 
     " " => "_" 
    } 
    end 

我想有機會獲得title，進行更改，並添加到permalink。

但我不知道如何在我的方法中訪問title。

Answer 1

title應該工作 - 隨着self.title

你能告訴我們你已經嘗試過什麼，這是給你的錯誤？