Show deprecated message instead of raise exception in `compiled_method_container` method

Since #35036, the subclasses of `ActionView::Base` requires
the `compiled_method_container`.
This is incompatible. For example, `web-console` use view class that
subclass of `ActionView::Base`, and does not work it now cause of this.

Actually, since it seems that it is only `ActionView::Base` that
`compiled_method_container` is necessary, modified the condition that
emits a warning.

2 files changed, 16 insertions, 5 deletions

diff --git a/actionview/lib/action_view/base.rb b/actionview/lib/action_view/base.rb
index 712e5d251e..c0d2d258c5 100644
--- a/actionview/lib/action_view/base.rb
+++ b/actionview/lib/action_view/base.rb
@@ -273,11 +273,15 @@ module ActionView #:nodoc:
     end
 
     def compiled_method_container
-      raise NotImplementedError, <<~msg
-        Subclasses of ActionView::Base must implement `compiled_method_container`
-        or use the class method `with_empty_template_cache` for constructing
-        an ActionView::Base subclass that has an empty cache.
-      msg
+      if self.class == ActionView::Base
+        ActiveSupport::Deprecation.warn <<~eowarn
+          ActionView::Base instances must implement `compiled_method_container`
+          or use the class method `with_empty_template_cache` for constructing
+          an ActionView::Base instances that has an empty cache.
+        eowarn
+      end
+
+      self.class
     end
 
     def in_context(options, locals)
diff --git a/actionview/test/template/render_test.rb b/actionview/test/template/render_test.rb
index cda8c942d8..543df7a71a 100644
--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -367,6 +367,13 @@ module RenderTestCases
     end
   end
 
+  def test_without_compiled_method_container_is_deprecated
+    view = ActionView::Base.with_view_paths(ActionController::Base.view_paths)
+    assert_deprecated("ActionView::Base instances must implement `compiled_method_container`") do
+      assert_equal "Hello world!", view.render(file: "test/hello_world")
+    end
+  end
+
   def test_render_partial_without_object_does_not_put_partial_name_to_local_assigns
     assert_equal "false", @view.render(partial: "test/partial_name_in_local_assigns")
   end