It is an engine (because of tasks) not a railtie

David Heinemeier Hansson · David Heinemeier Hansson · commit 44aab4d65931 · 2017-07-07T17:13:02.000+02:00
diff --git a/lib/active_storage.rb b/lib/active_storage.rb
@@ -1,5 +1,5 @@
 require "active_record"
-require "active_storage/railtie" if defined?(Rails)
+require "active_storage/engine" if defined?(Rails)
 
 module ActiveStorage
   extend ActiveSupport::Autoload
diff --git a/lib/active_storage/engine.rb b/lib/active_storage/engine.rb
@@ -1,4 +1,4 @@
-require "rails/railtie"
+require "rails/engine"
 
 module ActiveStorage
   class Engine < Rails::Engine # :nodoc:

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-require "rails/railtie"`
	`1`	`+require "rails/engine"`
`2`	`2`
`3`	`3`	`module ActiveStorage`
`4`	`4`	`class Engine < Rails::Engine # :nodoc:`