3 files changed, 7 insertions, 17 deletions
diff --git a/activesupport/lib/active_support.rb b/activesupport/lib/active_support.rb
index 40a9181493..9e242ddeaa 100644
--- a/activesupport/lib/active_support.rb
+++ b/activesupport/lib/active_support.rb
@@ -33,8 +33,8 @@ require "active_support/core_ext/date_and_time/compatibility"
 module ActiveSupport
   extend ActiveSupport::Autoload
 
-  autoload :ActionableError
   autoload :Concern
+  autoload :ActionableError
   autoload :CurrentAttributes
   autoload :Dependencies
   autoload :DescendantsTracker
diff --git a/activesupport/lib/active_support/actionable_error.rb b/activesupport/lib/active_support/actionable_error.rb
index 8adf40cc3d..7db14cd178 100644
--- a/activesupport/lib/active_support/actionable_error.rb
+++ b/activesupport/lib/active_support/actionable_error.rb
@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "active_support/concern"
-
 module ActiveSupport
   # Actionable errors let's you define actions to resolve an error.
   #
@@ -11,14 +9,10 @@ module ActiveSupport
   module ActionableError
     extend Concern
 
-    NonActionable = Class.new(StandardError)
-
-    NoActions = Hash.new do |_, name| # :nodoc:
-      raise NonActionable, "Cannot find action \"#{name}\""
-    end
+    class NonActionable < StandardError; end
 
     included do
-      class_attribute :_actions, default: NoActions.dup
+      class_attribute :_actions, default: {}
     end
 
     def self.actions(error) # :nodoc:
@@ -26,12 +20,14 @@ module ActiveSupport
       when ActionableError, -> it { Class === it && it < ActionableError }
         error._actions
       else
-        NoActions
+        {}
       end
     end
 
     def self.dispatch(error, name) # :nodoc:
-      actions(error.is_a?(String) ? error.constantize : error)[name].call
+      actions(error).fetch(name).call
+    rescue KeyError
+      raise NonActionable, "Cannot find action \"#{name}\""
     end
 
     module ClassMethods
diff --git a/activesupport/test/actionable_error_test.rb b/activesupport/test/actionable_error_test.rb
index fb2abf2bcf..63046b937c 100644
--- a/activesupport/test/actionable_error_test.rb
+++ b/activesupport/test/actionable_error_test.rb
@@ -37,12 +37,6 @@ class ActionableErrorTest < ActiveSupport::TestCase
     end
   end
 
-  test "dispatches actions from error class as string and name" do
-    assert_changes "DispatchableError.flip2", from: false, to: true do
-      ActiveSupport::ActionableError.dispatch DispatchableError.name, "Flip 2"
-    end
-  end
-
   test "cannot dispatch missing actions" do
     err = assert_raises ActiveSupport::ActionableError::NonActionable do
       ActiveSupport::ActionableError.dispatch NonActionableError, "action"