1 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 6346a95d57..a981fa97d9 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -88,6 +88,14 @@ module ActiveRecord
       end
     end
 
+    initializer "active_record.database_selector" do
+      if config.active_record.database_selector
+        resolver = config.active_record.delete(:database_resolver)
+        operations = config.active_record.delete(:database_operations)
+        config.app_middleware.use ActiveRecord::Middleware::DatabaseSelector, resolver, operations
+      end
+    end
+
     initializer "Check for cache versioning support" do
       config.after_initialize do |app|
         ActiveSupport.on_load(:active_record) do