[Solved] Given this SwiftData setup code snippet, what will be the output when fetching all Person objects?... context.fetch(FetchDescriptor<Person>()) print(people?.count ?? | iOS Swift

iOS Swift - Local Data Persistence

Given this SwiftData setup code snippet, what will be the output when fetching all Person objects?

let container = ModelContainer(for: Person.self)
let context = container.mainContext
let people = try? context.fetch(FetchDescriptor<Person>())
print(people?.count ?? 0)

ANumber of Person objects stored in the container

BAlways prints 0 because fetchRequest is invalid

CThrows a runtime error due to missing save

DPrints nil because context is not initialized

Step-by-Step Solution

Solution:

Step 1: Understand ModelContainer and FetchDescriptor
The container is created for Person, context is obtained, and FetchDescriptor<Person>() is called to get all Person objects.
Step 2: Analyze the fetch result
If there are Person objects saved, the count will be printed. If none, 0 is printed. No runtime error or nil context occurs here.
Final Answer:
Number of Person objects stored in the container -> Option A
Quick Check:
Fetching with context returns stored objects count [OK]

Quick Trick: fetchRequest() returns all saved objects count [OK]

Common Mistakes:

Assuming fetchRequest is invalid
Expecting runtime error without save
Thinking context is nil after container creation

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More iOS Swift Quizzes

Given this SwiftData setup code snippet, what will be the output when fetching all Person objects?

Step 1: Understand ModelContainer and FetchDescriptor

Step 2: Analyze the fetch result

Final Answer:

Quick Check:

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