Rails 7.1 deprecation notice for `cache_format_version` in Rails `test` environment

[asgeo1]

This line of code in this gem, is producing a deprecation warning with Rails 7.1

graphql-ruby-fragment_cache/lib/graphql/fragment_cache/railtie.rb

Line 28 in 1c08b1f

config.graphql_fragment_cache.store = :null_store

But only in the test environment.

DEPRECATION WARNING: Support for `config.active_support.cache_format_version = 6.1` has been deprecated and will be removed in Rails 7.2

It doesn't matter if you set config.active_support.cache_format_version = 7.1 in the Rails environment or intializer, the deprecation warning will still happen.

This is because that line of code is executing before Rails gets a chance to boot and set the correct cache_format_version.

If using RSpec, a possible workaround for now, is in rails_helper.rb to set the cache format version prior to the gem being loaded. e.g.

require "spec_helper"

# NOTE: this is a fix for graphql-fragment_cache, which is initializing it's own cache in the test environment
require "active_support/cache"
ActiveSupport::Cache.format_version = 7.1

require File.expand_path("../config/environment", __dir__)
require "rspec/rails"

RSpec.configure do |config|
  ...

[Drowze]

I can confirm this is still an issue in latest rails version (v7.1.3.4) along with latest graphql-ruby-fragment_cache version (v1.20.2)

The line where the warning happens is now different though:

graphql-ruby-fragment_cache/lib/graphql/fragment_cache/railtie.rb

Line 22 in 8ce934d

store = ActiveSupport::Cache.lookup_store(store)

For now I'm using the suggested workaround as well (setting format_version before the gem is loaded in test environment).

[noma4i]

@DmitryTsepelev Rails 7.2 is out and the cache_format_version was removed.

[DmitryTsepelev]

@asgeo1 @Drowze @noma4i Hey! This should probably be a fix #118. I do not have any app that uses the gem right now, could you please try the fix out before I merge it in?

[DmitryTsepelev]

Fix is here #119, will be a part of the next release, thanks @noma4i 🙂

[Drowze]

Just upgraded from 1.20.2 to 1.20.4 and it seems fixed now! Thank you! 😄

EDIT: ops! too early! It seems the warning is back:

The issue is that Rails.application evaluates to nil at the time the railtie is loaded. I think simply adding a initializer block should fix the problem (so setting the cache store to null happens as part of the rails initialization process, after Rails.application is actually defined).

Tried to tackle this issue and opened PR at #120 😃