Add Mongoid, MongoDB ODM for Ruby

config/initializers/mongoid.rb

@@ -0,0 +1,25 @@
+# rubocop:todo all
+Mongoid.configure do
+  target_version = "9.0"
+
+  # Load Mongoid behavior defaults. This automatically sets
+  # features flags (refer to documentation)
+  config.load_defaults target_version
+
+  # It is recommended to use config/mongoid.yml for most Mongoid-related
+  # configuration, whenever possible, but if you prefer, you can set
+  # configuration values here, instead:
+  # 
+  #   config.log_level = :debug
+  #
+  # Note that the settings in config/mongoid.yml always take precedence,
+  # whatever else is set here.
+end
+ 
+# Enable Mongo driver query cache for Rack
+# Rails.application.config.middleware.use(Mongo::QueryCache::Middleware)
+ 
+# Enable Mongo driver query cache for ActiveJob
+# ActiveSupport.on_load(:active_job) do
+#   include Mongo::QueryCache::Middleware::ActiveJob
+# end