Deleting documents in Firebase - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to delete a document from Firestore.

Firebase

await firestore.collection('users').doc([1]).delete();

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

AdocId

BuserId

C'userId123'

Ddocument

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without quotes.

Forgetting to call the delete() method.

To delete a document, you need to specify its exact ID as a string inside doc().

2fill in blank

medium

Complete the code to delete a document using async/await syntax.

Firebase

async function removeDoc() {
  try {
    await firestore.collection('posts').doc([1]).delete();
  } catch (error) {
    console.error(error);
  }
}

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

ApostId

B'post123'

CdocRef

DdocumentId

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a variable without quotes.

Not awaiting the delete() call.

The document ID must be a string literal inside doc() to delete the correct document.

3fill in blank

hard

Fix the error in the code to delete a Firestore document.

Firebase

firestore.collection('orders').[1]('orderId123').delete();

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

Adoc

Bdelete

Cget

Dset

Attempts:

3 left

💡 Hint

Common Mistakes

Using get() instead of doc().

Calling delete() without a document reference.

The doc() method is used to specify the document reference before calling delete().

4fill in blank

hard

Fill both blanks to delete a document and handle errors properly.

Firebase

firestore.collection('products').[1]([2]).delete().catch(error => console.error(error));

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

Adoc

B'prod456'

Cget

D'productId'

Attempts:

3 left

💡 Hint

Common Mistakes

Using get() instead of doc().

Passing a variable without quotes as document ID.

Use doc() with the exact document ID string to delete the document and catch errors.

5fill in blank

hard

Fill all three blanks to delete a document inside an async function with error handling.

Firebase

async function deleteUser() {
  try {
    await firestore.collection([1]).doc([2]).[3]();
  } catch (error) {
    console.error(error);
  }
}

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

A'users'

B'user789'

Cdelete

Dremove

Attempts:

3 left

💡 Hint

Common Mistakes

Using remove() instead of delete().

Not using quotes around collection or document IDs.

Use the collection name as a string, the document ID as a string, and call the delete() method to remove the document.