Question

I’m trying to make an image of a graph using ruby-graphviz by

@graph.output(:output => "png", :file => "public/images/graph.png")

Since I’m using heroku, how can I save the image locally and send it to an s3 bucket, or just send it straight to the s3 bucket? I’d appreciate any help.

Answer 1

There are two directories that are
writeable: ./tmp and ./log (under
your application root). If you wish to
drop a file temporarily for the
duration of the request, you can write
to a filename like
#{RAILS_ROOT}/tmp/myfile_#{Process.pid}.
There is no guarantee that this file
will be there on subsequent requests
(although it might be), so this should
not be used for any kind of permanent
storage.

http://docs.heroku.com/constraints