Rails - 如何获取资产的文件路径（不是 url 路径）？

Question

I have a weekly generator that zips some files. Some are assets in app/assets/images/xxx.xxx some are uploaded via Paperclip and in public/system/env...

The file paths I have start after app , without /images/ or public .

I'll get something like /assets/some.png or /system/production/xyz/some.jpg , and these will be served fine as a URL path, but I want to collect them in a file.

How can I get the filepath of an asset?

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I think this is an easier way to explain it.

Given the asset URI string, how can I find and get the asset's file path?

The asset URL path /assets/logo.png could be one of the files:

public/logo.png
public/assets/logo.png
app/assets/images/logo.png 

Answer 1

在生产中，资产应该从公共根文件夹 /public/assets/logo.png 预编译和提供

Answer 2

Rails.root gives you the absolute path to your project's root. (It returns a Pathname object)

You can then do something like this:

Rails.root.join("some_dir1", "some_dir2", "some_file")

So to get a path to a file inside public/assets :

Rails.root.join("public", "assets", "file.jpg")