在Rails中，如何强制更新客户端的js/css文件? [英] In Rails, how can I force update the client's js/css files?

问题描述

当我使用 javascript_include_tag 或 stylesheet_link_tag 包含文件时，它们的末尾都有一个数字，以使其更容易规避浏览器缓存(更新文件而不更改数字)，浏览器仍使用缓存的版本；更改编号，浏览器将下载并使用更新的文件.

When I use javascript_include_tag or stylesheet_link_tag to include files, they have a number at the end to make it easier to circumvent browser caching (update the file without changing the number, the browser still uses the cached version; change the number, the browser will download and use the updated file).

但是这个数字从哪里来?什么时候更新?而我该如何手动更新呢?

But where does this number come from? When is it updated? And how can I manually update it?

我仍在使用Rails 2.3.9，但是我猜对于任何版本的Rails的答案都是有用的，因为找不到.

I'm still using Rails 2.3.9, but I guess answers for any version of Rails would be helpful since I couldn't find any.

推荐答案

基本上，在Rails 2中，该数字来自文件的上次修改日期，并作为查询参数添加到链接中.在Rails 3中，它来自文件内容的哈希，并添加到文件名本身.后者应该有所改进-请参见此页以获取有关两者之间区别的更多信息.

Basically, in Rails 2, the number comes from the file's last modification date, and is added to the link as a query parameter. In Rails 3, it comes from a hash of the file's contents, and is added to the filename itself. The latter should be an improvement - see this page for more on the difference between the two.

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