Merge pull request rails#51096 from joshuay03/fix-missing-template-error-page-with-nested-controller-paths

[Fix rails#51095] Missing template error page showing incorrect view path example for nested controller path

Author: rafaelfranca

actionpack/CHANGELOG.md

@@ -1,3 +1,8 @@
+*   Fix the error page that is displayed when a view template is missing to account for nested controller paths in the
+    suggested correct location for the missing template.
+
+    *Joshua Young*
+
 *   Add `save_and_open_page` helper to IntegrationTest
     `save_and_open_page` is a helpful helper to keep a short feedback loop when working on system tests.
     A similar helper with matching signature has been added to integration tests.

actionpack/lib/action_dispatch/middleware/templates/rescues/missing_exact_template.html.erb

@@ -11,7 +11,7 @@
     </p>
     <p>
       For example, a <code><%= @exception.controller %>#<%= @exception.action_name %></code> action defined in <code>app/controllers/<%= @exception.controller.controller_path %>_controller.rb</code> should have a corresponding view template
-      in a file named <code>app/views/<%= @exception.controller.controller_name %>/<%= @exception.action_name %>.html.erb</code>.
+      in a file named <code>app/views/<%= @exception.controller.controller_path %>/<%= @exception.action_name %>.html.erb</code>.
     </p>
     <p>
       However, if this controller is an API endpoint responding with 204 (No Content), which does not require a view template because it doesn't serve an HTML response, then this error will occur when trying to access it with a browser. In this particular scenario, you can ignore this error.