metacollect | A lint to collect some crate metadata

As you correctly spotted, the error was coming from a mismatch between the data in your response and the getter you were using to retrieve it.

Since your 'items' field contains an array you'd need to use

List data = response.ScriptData.GetGSDataList("items");

and iterate through the list.

To return a single object rather than an array you could change your cloud code query to:

Spark.metaCollection('items').findOne({"description": description})

Note that if multiple documents satisfy the query provided, mongo will return the first document it finds.

If you have any further questions or run into any problems while using GameSparks, you can contact our support team via - https://support.gamesparks.net/support/home

Yes, it's called Lazy Initialization. From the example on the Wikipedia Lazy Loading page:

Lazy initialization

Main article: Lazy initialization

With lazy initialization, the object to be lazily loaded is originally set to null, and every request for the object checks for null and creates it "on the fly" before returning it first, as in this C# example: