How to check if a property of a Firestore document exist in the security rules?

Asked Apr 30 '19 at 17:46

Active Apr 30 '19 at 17:46

Viewed 18 times

I thought resource.data.someProperty != null will be true when someProperty does not exist in the resource document but it seems not.

I tried resource.data.someProperty != undefined but it throws Null value error when testing with the simulator.

How exactly do I do that, and where is it documented? I am having trouble learning the security rules through reading the official references & guides.

asked Apr 30 '19 at 17:46

czphilip

1

Use the `in` operator of the map that contains the document. https://firebase.google.com/docs/reference/rules/rules.Map – Doug Stevenson Apr 30 '19 at 18:12
Thank you! Didn't think of document as a Map type. – czphilip Apr 30 '19 at 18:24

How to check if a property of a Firestore document exist in the security rules?

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