Google cloud datastore only store unique entity

Question

I am trying to learn NoSQL with Google Datastore but I am running into a problem with uniqueness.

Consider an ecommerce store, it has categories and products.

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Answer 1

You can use "sku" as an "id" (if it's a number) or "name" (if it's a string) for your entity, instead of storing "sku" as a property. Then it's guaranteed to be unique as it becomes part of the unique entity key.