在开发中禁用链轮资产缓存 [英] Disable Sprockets asset caching in development

问题描述

我正在使用 Rails 3.2.13 和 Rails Asset Pipeline.我想使用资产管道，以便我可以对我的资产使用 SASS、CoffeeScript 和 ERB，并让管道自动编译它们，因此我无法在开发中关闭管道.我从来没有在开发中预编译资产，甚至没有 public/assets/ 目录.

但是，当我对包含的文件进行更改时，例如对包含(渲染)在 layout.html.erb_partial.html.erb 文件> 文件，而不更改文件本身(在此示例中为 layout.html.erb)，Sprockets 不会检测到更改并使缓存无效，因此我不断获得相同的陈旧文件.当我在积极的开发中这样做时，我想禁用任何资产缓存，以便我可以获得每个请求的更改，但我不知道如何做到这一点.我在 development.rb 中设置了以下所有内容:

config.action_controller.perform_caching = falseconfig.action_dispatch.rack_cache = nilconfig.middleware.delete Rack::Cacheconfig.assets.debug = trueconfig.assets.compress = falseconfig.cache_classes = false

尽管如此，文件仍会显示在 tmp/cache/assets/ 和 tmp/cache/sass/ 下，并且将来的请求无法进行更改.现在，每次我想看到更改时，我都必须手动删除这些目录.

遗憾的是，资产管道的 RoR 指南的缓存工作原理部分的全部内容是:><块引用>

Sprockets 使用默认的 Rails 缓存存储来缓存资源开发生产.

待办事项:添加有关更改默认商店的更多信息.

那么，如何让 Sprockets 按需编译资产但不缓存结果?

解决方案

这是魔法咒语:

config.assets.cache_store = :null_store # 禁用资产缓存config.sass.cache = false # 禁用 SASS 编译器缓存

资产管道有它自己的缓存实例，设置 config.assets.cache = false 什么都不做，所以你必须将它的缓存设置为 null_store禁用它.

即便如此，SASS 编译器也有自己的缓存，如果你需要禁用它，你必须单独禁用它.

I'm using Rails 3.2.13 and the Rails Asset Pipeline. I want to use the Asset Pipeline so I can use SASS and CoffeeScript and ERB for my assets and have the Pipeline automatically compile them, so I cannot turn off the pipeline in development. I am not precompiling assets in development ever and there is not even a public/assets/ directory.

However, when I make changes to an included file, such as to a _partial.html.erb file that is included (rendered) in a layout.html.erb file, without changing the file doing the including itself (in this example layout.html.erb), Sprockets doesn't detect the change and invalidate the cache, so I keep getting the same stale file. When I'm doing this in active development, I want to disable any caching of assets so I can get the changes on every request but I cannot figure out how to do this. I have set all of the following in my development.rb:

config.action_controller.perform_caching = false
config.action_dispatch.rack_cache =  nil
config.middleware.delete Rack::Cache
config.assets.debug = true
config.assets.compress = false
config.cache_classes = false

Still, even with this, files show up under tmp/cache/assets/ and tmp/cache/sass/ and changes are not available on future requests. Right now I have to manually delete those directories every time I want to see a change.

Unfortunately, the entire contents of the How Caching Works section of the RoR Guide for the Asset Pipeline is:

Sprockets uses the default Rails cache store to cache assets in development and production.

TODO: Add more about changing the default store.

So, how can I get Sprockets to compile assets on demand but not cache the results?

解决方案

Here's the magic incantation:

config.assets.cache_store = :null_store  # Disables the Asset cache
config.sass.cache = false  # Disable the SASS compiler cache

The asset pipeline has it's own instance of a cache and setting config.assets.cache = false does nothing, so you have to set its cache to be the null_store to disable it.

Even then, the SASS compiler has it's own cache, and if you need to disable it, you have to disable it separately.

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