Fingerprint for erb appended assets

[ysyyork]

My use case is, I have a js config file which will use rails setting variables. So I embedded a ruby statement in my js file and append the file with .erb extension. It works well for the first time, but when I change the variables, this js file cannot be re compiled, or technically it re compiled with the same fingerprint digest and when serving to browser, browser find the digest is the same as the cached one so it only uses the cached version which is not actually up to date.

Expected behavior

js file with erb extension should be re compiled and the fingerprint should be different based on the content of the embedded variable. If I have such a sentence in the code <%= ENV['MY_SETTING'] %>, when the actual MY_SETTING variable changes, the fingerprint digest should also change.

Actual behavior

The digest does not change even if the MY_SETTING variable changes.

System configuration

• sprockets-rails 3.1.1
• ruby 2.2.1p85

[ysyyork]

Find the same issue here #366, I will close this. Thanks