模型“实用程序"放在哪里Ruby on Rails 中的函数 [英] Where to put model "utility" functions in Ruby on Rails

问题描述

我有一个包含多个模型的 Rails 应用.

I have a rails app with several models.

我想从多个模型访问一个函数.

I have a function that I want to access from several models.

放置此代码的最佳位置是什么，我如何使其可从需要获取它的模型中访问?

What's the best place to put this code and how can I make it accessible from the models that need to get at it?

我的理解是助手仅用于视图.这是正确的吗?

My understanding is that helpers are just for views. Is this correct?

创建插件并将其放在供应商文件夹中似乎是错误的 - 这是我的代码并且是我的应用程序不可或缺的一部分.这是正确的吗?

It seems wrong to create a plug-in and put it in the vendor folder - this is my code and integral to my app. Is this correct?

谢谢.

推荐答案

最简单的解决方案是在 lib 下创建一个模块并将其混合到需要它的模型中，例如，在 lib/fooable.rb 中:

The simplest solution would be to create a module under lib and mix this into the models that need it, for instance, in lib/fooable.rb:

module Fooable
  def do_foo
  end
end

然后在您的各种模型中:

And then in your various models:

class MyModel < ActiveRecord::Base
  include Fooable
end

不需要 fooable.rb，只要使用正确的约定命名，Rails 自动加载机制就会为您找到它.

No need to require fooable.rb, the Rails autoloading mechanism will find it for you as long as it's named using correct conventions.

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