CRUD operations with SwiftData in iOS Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new SwiftData model instance and save it.

iOS Swift

let newItem = Item(name: "Sample")
context.insert(newItem)
try context.[1]()

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

Asave

Bpersist

Ccommit

Dstore

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like commit or persist which are not part of SwiftData context.

Forgetting to call save() after creating a new item.

In SwiftData, you call save() on the context to save changes like new items.

2fill in blank

medium

Complete the code to fetch all items from SwiftData context.

iOS Swift

let request = FetchDescriptor<Item>()
let items = try context.[1](request)

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

AgetAll

BfetchAll

Cretrieve

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Using fetchAll which is not a SwiftData method.

Using getAll or retrieve which are not valid context methods.

The fetch(_) method is used to get data matching a fetch descriptor in SwiftData.

3fill in blank

hard

Fix the error in the code to update an existing item and save changes.

iOS Swift

item.name = "Updated"
try context.[1]()

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

Asave

Bcommit

Cupdate

Dapply

Attempts:

3 left

💡 Hint

Common Mistakes

Using commit or update which are not SwiftData context methods.

Forgetting to call save() after modifying the item.

To save updates in SwiftData, you call save() on the context after changing properties.

4fill in blank

hard

Fill both blanks to delete an item from SwiftData and save the change.

iOS Swift

context.[1](item)
try context.[2]()

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

Adelete

Bremove

Csave

Dcommit

Attempts:

3 left

💡 Hint

Common Mistakes

Using remove instead of delete which is not a SwiftData method.

Using commit instead of save to persist changes.

Use delete(_) to remove an item, then save() to persist the deletion.

5fill in blank

hard

Fill all three blanks to create a filtered fetch request for items with name longer than 5 characters.

iOS Swift

let request = FetchDescriptor<Item>(
  predicate: #Predicate { \.name.[1] [2] [3] }
)

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

Acount

B>

C5

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using length instead of count which is not a Swift property.

Using wrong comparison operators or values.

Use count on the string property, then compare with > and the number 5 to filter items.