firebase - Firestore Security - allow only known fields

Question

I can’t figure out how to properly set the ‘.validate’ rule in Firestore. Basically, I want to allow a User document to contain only the fields I know:

user {
 name: "John"
 phone: "2342222"
 address: "5th Avenue"
}

I dont want any other fields besides the 3 above (name, phone, address).

The fields WON’T be saved at the same time. name and phone will be saved first, and address will be saved only when user wants to edit his profile.

I've tried the rules below but don’t seem to work:

allow read: if request.auth.uid == uid;
allow write: if request.auth.uid == uid && 
 request.resource.data.keys() in ["name", "phone", "address"]

Thanks for help.

Answer 1

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