chore(flipper): enable caching in memory

Gemfile

@@ -33,6 +33,7 @@ gem 'dotenv-rails', require: 'dotenv/rails-now' # dotenv should always be loaded
 gem 'dry-monads'
 gem 'flipper'
 gem 'flipper-active_record'
+gem 'flipper-active_support_cache_store'
 gem 'flipper-ui'
 gem 'fugit'
 gem 'geocoder'

Gemfile.lock

@@ -237,6 +237,9 @@ GEM
     flipper-active_record (1.2.2)
       activerecord (>= 4.2, < 8)
       flipper (~> 1.2.2)
+    flipper-active_support_cache_store (1.2.2)
+      activesupport (>= 4.2, < 8)
+      flipper (~> 1.2.2)
     flipper-ui (1.2.2)
       erubi (>= 1.0.0, < 2.0.0)
       flipper (~> 1.2.2)
@@ -833,6 +836,7 @@ DEPENDENCIES
   factory_bot
   flipper
   flipper-active_record
+  flipper-active_support_cache_store
   flipper-ui
   fugit
   geo_coord

config/initializers/flipper.rb

@@ -1,6 +1,10 @@
 # This setup is primarily for first deployment, because consequently
 # we can add new features from the Web UI. However when the new DB is created
 # this will immediately migrate the default features to be controlled.
+#
+require 'flipper/adapters/active_record'
+require 'flipper/adapters/active_support_cache_store'
+
 def setup_features(features)
   existing = Flipper.preload(features).map { _1.name.to_sym }
   missing = features - existing
@@ -41,6 +45,16 @@ ActiveSupport.on_load(:active_record) do
   end
 end
 
+Flipper.configure do |config|
+  config.adapter do
+    Flipper::Adapters::ActiveSupportCacheStore.new(
+      Flipper::Adapters::ActiveRecord.new,
+      ActiveSupport::Cache::MemoryStore.new,
+      expires_in: 10.seconds
+    )
+  end
+end
+
 Rails.application.configure do
   config.flipper.strict = Rails.env.development?
 end