仅在存在资产时包括资产 [英] Include Assets Only If They Exist

问题描述

在当前的Rails应用中，我们遵循某些模式来包含资产，例如脚本和样式表.

In our current rails app, we are following certain patterns for including assets such as scripts and stylesheets.

例如，一种这样的模式是(布局内的代码):

For instance, one such pattern is (code inside the layout):

= stylesheet_link_tag controller.controller_name

这里的问题是不是 all 的所有控制器都将具有关联的样式表.检查资产是否存在的最佳方法是什么?具体来说，由于缓存破坏资产名称，我知道这里有些技巧.

The problem here is that not all of the controllers are going to have associated stylesheets. What is the best way to check if an asset exists? Specifically, I know there is some trickery here due to the cache busting asset names.

推荐答案

最后弄清楚了这一点.可以通过以下方式检查资产的存在:

Finally figured this one out. Asset existence can be checked as follows:

YourApp::Application.assets.find_asset("#{asset}.css").nil?

答案将是:

= stylesheet_link_tag controller.controller_name if YourApp::Application.assets.find_asset("#{controller.controller_name}.css")

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