GCP - Cloud Firestore and Bigtable
Which of the following is the correct syntax to get a reference to a document named
user123 inside a collection users in Firestore using Node.js?Which of the following is the correct syntax to get a reference to a document named user123 inside a collection users in Firestore using Node.js?
easy📝 Configuration Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify correct method to access collection and document
Usecollection('users')to access the collection, thendoc('user123')to get the document.Step 2: Check path correctness
Directfirestore.doc(full/path)works for existing paths, but incorrect paths, reversed order, or misusingdoc()on document references fail. Chainingcollection().doc()is recommended.Final Answer:
const docRef = firestore.collection('users').doc('user123'); -> Option BQuick Check:
Use collection().doc() chaining for document refs [OK]
Quick Trick: Chain collection() then doc() for document reference [OK]
Common Mistakes:
- Swapping collection and document names
- Using firestore.doc() with incorrect path format
- Confusing collection() and doc() order
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