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ViewsFirestore duplicate verification conditions
My Firestore database looks like this
For documents I use dynamic IDs. I do not use the user ID in the path, it is stored in the field. The fields have the values user and active.
How can I prevent adding new entries if, for example, the user 37870283 already has an active = true?
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Juan Pablo Isaza
1 answers
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There is no way to ensure the uniqueness of a field value in Firestore security rules. The only ways to ensure uniqueness are:
- Use the thing that needs to be unique as the document ID.
- Perform all writes from a single, trusted process (like Cloud Functions), and use transactions there.
Also see:
- Cloud Firestore: Enforcing Unique User Names
- Prevent duplicate entries in Firestore rules not working
- Firestore security rule to check if character username already exists
And more from this list
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Juan Pablo Isaza
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