1 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/database_configurations/url_config.rb b/activerecord/lib/active_record/database_configurations/url_config.rb
index c3d9798c37..ad4df3d3f2 100644
--- a/activerecord/lib/active_record/database_configurations/url_config.rb
+++ b/activerecord/lib/active_record/database_configurations/url_config.rb
@@ -41,6 +41,13 @@ module ActiveRecord
         true
       end
 
+      # Determines whether a database configuration is for a replica / readonly
+      # connection. If the `replica` key is present in the config, `replica?` will
+      # return true.
+      def replica?
+        config["replica"]
+      end
+
       private
         def build_config(original_config, url)
           if /^jdbc:/.match?(url)