lib/active_admin/engine.rb in activeadmin-4.0.0.beta3 vs lib/active_admin/engine.rb in activeadmin-4.0.0.beta4

@@ -13,10 +13,13 @@
       if app.config.respond_to?(:assets)
         app.config.assets.precompile += %w(active_admin.js active_admin.css active_admin_manifest.js)
       end
     end
 
-    initializer "active_admin.importmap", before: "importmap" do |app|
+    initializer "active_admin.importmap", after: "importmap" do |app|
+      # Skip if importmap-rails is not installed
+      next unless app.config.respond_to?(:importmap)
+
       ActiveAdmin.importmap.draw(Engine.root.join("config", "importmap.rb"))
       package_path = Engine.root.join("app/javascript")
       if app.config.respond_to?(:assets)
         app.config.assets.paths << package_path
         app.config.assets.paths << Engine.root.join("vendor/javascript")