如何将simple_form与普通的Ruby类一起使用？

Question

我有一个信用卡类，我想对各种属性使用simple_form f.input方法用于验证等，但我收到有关model_name的错误。有没有简单的方法来做到这一点？

= simple_form_for @credit_card, url: join_network_path do |f| 
    .payment-errors 
    = f.input :card_number 
    = f.input :cvc 
    = f.input :expiry_month 
    = f.input :expiry_year 
    = f.submit 'Join Network' 

Answer 1

你需要符合API加载ActiveModel ...

有效：

class CreditCard 
    include ActiveModel::Validations 
    include ActiveModel::Conversion 
    extend ActiveModel::Naming 

    def initialize(attributes = {}) 
    attributes.each do |name, value| 
     send("#{name}=", value) 
    end 
    end 

    def persisted? 
    false 
    end 
end 

一些背景资料：

1. http://yehudakatz.com/2010/01/10/activemodel-make-any-ruby-object-feel-like-activerecord/
2. http://railscasts.com/episodes/219-active-model