Fixed: Analytics for Rails not propagating to ActionPack.

lib/ddtrace/contrib/action_pack/configuration/settings.rb

@@ -8,7 +8,7 @@ module Configuration
         # Custom settings for the ActionPack integration
         class Settings < Contrib::Configuration::Settings
           option  :analytics_enabled,
-                  default: -> { env_to_bool(Ext::ENV_ANALYTICS_ENABLED, false) },
+                  default: -> { env_to_bool(Ext::ENV_ANALYTICS_ENABLED, nil) },
                   lazy: true
 
           option  :analytics_sample_rate,

lib/ddtrace/contrib/rails/configuration/settings.rb

@@ -8,11 +8,21 @@ module Configuration
         class Settings < Contrib::Configuration::Settings
           option  :analytics_enabled,
                   default: -> { env_to_bool(Ext::ENV_ANALYTICS_ENABLED, nil) },
-                  lazy: true
+                  lazy: true do |value|
+            value.tap do
+              # Update ActionPack analytics too
+              Datadog.configuration[:action_pack][:analytics_enabled] = value
+            end
+          end
 
           option  :analytics_sample_rate,
                   default: -> { env_to_float(Ext::ENV_ANALYTICS_SAMPLE_RATE, 1.0) },
-                  lazy: true
+                  lazy: true do |value|
+            value.tap do
+              # Update ActionPack analytics too
+              Datadog.configuration[:action_pack][:analytics_sample_rate] = value
+            end
+          end
 
           option :cache_service do |value|
             value.tap do

spec/ddtrace/contrib/rails/action_controller_spec.rb

@@ -5,9 +5,13 @@
   let(:rails_options) { { tracer: tracer } }
 
   before(:each) do
-    Datadog::RailsActionPatcher.patch_action_controller
     Datadog.configure do |c|
       c.use :rails, rails_options
+      # Manually activate ActionPack to trigger patching.
+      # This is because Rails instrumentation normally defers patching until #after_initialize
+      # when it activates and configures each of the Rails components with application details.
+      # We aren't initializing a full Rails application here, so the patch doesn't auto-apply.
+      c.use :action_pack
     end
   end
 
@@ -44,11 +48,6 @@ def index
       context 'that inherits from ActionController::Metal' do
         let(:base_class) { ActionController::Metal }
 
-        before(:each) do
-          # ActionController::Metal is only patched in 2.0+
-          skip 'Not supported for Ruby < 2.0' if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0.0')
-        end
-
         it_behaves_like 'a successful dispatch'
 
         context 'when response is overridden' do

spec/ddtrace/contrib/rails/analytics_spec.rb

@@ -6,9 +6,13 @@
   let(:configuration_options) { { tracer: tracer } }
 
   before(:each) do
-    Datadog::RailsActionPatcher.patch_action_controller
     Datadog.configure do |c|
       c.use :rails, configuration_options
+      # Manually activate ActionPack to trigger patching.
+      # This is because Rails instrumentation normally defers patching until #after_initialize
+      # when it activates and configures each of the Rails components with application details.
+      # We aren't initializing a full Rails application here, so the patch doesn't auto-apply.
+      c.use :action_pack
     end
   end
 
@@ -36,11 +40,6 @@ def index
     let(:action) { controller.action(name) }
     let(:env) { {} }
 
-    before(:each) do
-      # ActionController::Metal is only patched in 2.0+
-      skip 'Not supported for Ruby < 2.0' if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0.0')
-    end
-
     shared_examples_for 'a successful dispatch' do
       it do
         expect { result }.to_not raise_error