Rails - Apr 2010 - cache logic in js_include_tag and stylesheet_link_tag?

So using the magic :cache argument to combine multiple CSS or JS files
into one cached file, using stylesheet_link_tag or
javascript_include_tag respectively...

I sort of figured that if the arguments to the function changed,
including different files.... the combined cached file would be
re-generated.

This does not seem to be the case.

javascript_include_tag "a", "b", :cache =>
"my_key"

Stop application. Edit the code to be:

javascript_include_tag "a", "b", "c", :cache =>
"my_key"

Restart the application. Run it.  The combined cached my_key.js file
still only includes "a" and "b", the cached file was not
invalidated
when I added "c" to it.  I had to go and find the file and rm it
myself.

Is this a bug? Or is this expected behavior? Is there something I''m
missing?  Under what circumstances is the cached file supposed to be
regenerated?  If the last-modified timestamp changes on one of the
included files, will it be regenerated? Will it EVER be re-generated?
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Jonathan Rochkind wrote:
> Is this a bug? Or is this expected behavior? Is there something
I''m
> missing?  Under what circumstances is the cached file supposed to be
> regenerated?  If the last-modified timestamp changes on one of the
> included files, will it be regenerated? Will it EVER be re-generated?
I see the same behavior, and I basically use the same solution. Probably 
not a bad idea to add a step to your Capistrano (or whatever deploy 
tool) to delete those files on each deployment.
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Robert Walker wrote:
> Jonathan Rochkind wrote:
>> Is this a bug? Or is this expected behavior? Is there something
I''m
>> missing?  Under what circumstances is the cached file supposed to be
>> regenerated?  If the last-modified timestamp changes on one of the
>> included files, will it be regenerated? Will it EVER be re-generated?
> 
> I see the same behavior, and I basically use the same solution. Probably 
> not a bad idea to add a step to your Capistrano (or whatever deploy 
> tool) to delete those files on each deployment.
Thanks for the response. I''m thinking this is a bug, and I''ll
try to go
ahead and file it in the tracker, although I lack the Rails fu to fix it 
myself.

In the absence of a fix, could also add something to your Rails app 
startup routines to delete the files, to work regardless of Capistrano 
use or not.
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Hi Jonathan

   Read this also.
http://maintainable.com/articles/rails_asset_cache

If any modification happens to js or css as specified, then before next 
release you can apply this trick


Sijo
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