如何访问我的Rails应用程序中gem生成的文件(png文件)? [英] How to access a file(png file) generated by a gem in my rails application?

问题描述

我正在编写一个gem和使用该gem的Rails应用程序.

Hi I am writing a gem and a rails application that uses this gem.

基于传递的值的gem会生成一个图像文件.(我正在将其写入gem的根目录中)

The gem based on values passed, produces a image file.(i am writing it in gem's root directory )

在我的Rails应用程序中，我想访问该图像文件.我怎样才能做到这一点.

In my rails application, I want to access that image-file. how can I do that.

我应该在gem和rails-app中进行哪些修改以实现此目标?

What modifications I should make both in the gem and the rails-app to achieve this?

推荐答案

来自铁路指南:

7将资产添加到您的宝石中

资产也可以以宝石的形式来自外部来源.

7 Adding Assets to Your Gems

Assets can also come from external sources in the form of gems.

一个很好的例子是 jquery-rails 宝石，它是Rails附带的标准的JavaScript库gem.此gem包含一个从 Rails :: Engine 继承的引擎类.这样，Rails会获悉此gem的目录可能包含资产以及 app/assets ， lib/assets 和 vendor/assets 该引擎的目录将添加到Sprockets的搜索路径中.

A good example of this is the jquery-rails gem which comes with Rails as the standard JavaScript library gem. This gem contains an engine class which inherits from Rails::Engine. By doing this, Rails is informed that the directory for this gem may contain assets and the app/assets, lib/assets and vendor/assets directories of this engine are added to the search path of Sprockets.

因此，基本上，创建 vendor/assets/your-image.jpg ，然后您需要以下内容:

So basically, create vendor/assets/your-image.jpg then you want something like:

lib/jquery/rails/engine.rb

module Jquery
  module Rails
    class Engine < ::Rails::Engine
    end
  end
end

在您看来，请使用资产助手，例如:

In your views, use the asset helpers such as:

<%= image_tag 'your-image.jpg' %>

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