Cloud Firestore CRUD in Flutter - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Firestore package in Flutter.

Flutter

import 'package:cloud_firestore/[1].dart';

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

Afirestore

Bfirebase

Cfirestore_core

Dfirestore_flutter

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'firebase' instead of 'firestore' in the import path.

Trying to import 'firestore_flutter' which does not exist.

The correct import for Firestore in Flutter is cloud_firestore/firestore.dart.

2fill in blank

medium

Complete the code to get a Firestore instance in Flutter.

Flutter

final FirebaseFirestore firestore = FirebaseFirestore.[1];

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

Ainitialize

Binstance

CgetInstance

Dcreate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'getInstance()' which is not defined in Flutter Firestore.

Trying to call 'initialize()' or 'create()' which do not exist.

Use FirebaseFirestore.instance to get the Firestore instance.

3fill in blank

hard

Fix the error in the code to add a new document to the 'users' collection.

Flutter

await firestore.collection('users').[1]({'name': 'Alice', 'age': 25});

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

Aupdate

Binsert

Cset

Dadd

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'update' which requires an existing document.

Using 'set' without specifying a document ID.

Using 'insert' which is not a Firestore method.

To add a new document with an auto-generated ID, use add().

4fill in blank

hard

Fill both blanks to update the 'age' field of a user document with ID 'user123'.

Flutter

await firestore.collection('users').doc([1]).[2]({'age': 30});

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

A'user123'

Bupdate

Cset

D'user456'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'set' which overwrites the whole document.

Using wrong document ID like 'user456'.

Use doc('user123') to select the document, then update() to change fields.

5fill in blank

hard

Fill all three blanks to delete a document with ID 'doc789' from the 'items' collection.

Flutter

await firestore.collection([1]).doc([2]).[3]();

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

A'items'

B'doc789'

Cdelete

Dremove

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'remove' which is not a Firestore method.

Using wrong collection or document IDs.

Use collection('items'), then doc('doc789'), and finally delete() to remove the document.