Firestore document model in GCP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a Firestore document reference.

GCP

doc_ref = db.collection('users').[1]('user123')

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Adocument

Badd

Cget

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'get' which retrieves data instead of referencing a document.

Using 'add' which adds a new document instead of referencing an existing one.

The document method creates a reference to a specific document in a collection.

2fill in blank

medium

Complete the code to add a new document with an auto-generated ID.

GCP

db.collection('orders').[1]({'item': 'book', 'qty': 3})

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Aupdate

Bset

Cadd

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'set' which requires a document reference.

Using 'update' which only modifies existing documents.

The add method adds a new document with an auto-generated ID to the collection.

3fill in blank

hard

Fix the error in the code to update a document field.

GCP

db.collection('products').doc('prod1').[1]({'price': 20})

Drag options to blanks, or click blank then click option'

Aset

Bupdate

Cadd

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'add' which creates a new document instead of updating.

Using 'set' which overwrites the whole document.

The update method modifies specific fields of an existing document without overwriting the whole document.

4fill in blank

hard

Fill both blanks to query documents where age is greater than 25.

GCP

results = db.collection('employees').where('age', [1], [2]).get()

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A==

B>

C25

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' which only matches exact values.

Using '<' which finds ages less than 25.

The where method filters documents. Use '>' to find ages greater than 25.

5fill in blank

hard

Fill all three blanks to create a dictionary of user names and their emails for users older than 30.

GCP

user_emails = {user.[1]: user.[2] for user in users if user.[3] > 30}

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Aname

Bemail

Cage

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'id' instead of 'name' for keys.

Filtering by 'email' instead of 'age'.

This dictionary comprehension maps user names to emails only if their age is over 30.