GCP - Cloud Firestore and Bigtable
Why might this Firestore document update fail? docRef.update({"location.city": "Boston"})
Why might this Firestore document update fail? docRef.update({"location.city": "Boston"})
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Understand dot notation in updates
Firestore supports dot notation to update nested fields like "location.city".Step 2: Identify common failure cause
If the document does not exist, update will fail because it cannot modify a non-existent document.Final Answer:
Because the document does not exist -> Option DQuick Check:
Update fails if document missing, dot notation allowed [OK]
Quick Trick: Ensure document exists before updating nested fields [OK]
Common Mistakes:
- Thinking dot notation is invalid
- Assuming update needs arrays
- Believing Firestore disallows nested fields
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