Static assets aren't up to date in production - ruby-on-rails

Question

I have a static asset being served at /assets/images/example.svg. I made a change to this SVG in the codebase, and pushed to production.
It's not updated because I have static asset caching set up:
config.serve_static_assets = true
config.cache_store = :redis_store, "#{ENV['OPENREDIS_URL']}/0", { expires_in: 90.minutes }
And here's the response headers for the asset:
I've run this command, which still doesn't expire my static assets:
heroku run rake tmp:cache:clear assets:clean:all assets:precompile
I've tried incrementing the config.assets.version, which didn't work either:
config.assets.version = '1.1'
How do you deal with static assets changing in the codebase? How do I manually expire my redis cache for a specific asset, or in general?

Answer 1

I'd just wait another 30 minutes for it to expire. From what I understand, when you serve static assets on heroku you lose out on fingerprinting, meaning the cache would not be invalidated even if you change your assets version.
I recently went the way of putting everything on S3 using the asset_sync gem. Everything has been incredibly peachy ever since.
Here's the configuration if you choose to go that route:
# Disable Rails's static asset server (Apache or nginx will already do this)
config.serve_static_assets = false
# Don't fallback to assets pipeline if a precompiled asset is missed
config.assets.compile = false
# Enable assets
config.assets.enabled = true
# Generate digests for assets URLs
config.assets.digest = true
config.action_controller.asset_host = "//your-bucket.s3.amazonaws.com"

Answer 2

In /config/environments/production.rb , try setting:
config.cache_classes = true
config.serve_static_assets = true
config.assets.compile = true
config.assets.digest = true