[Solved] Examine the following SwiftData model declaration:@Model class Event { var date: Date var location: String? }What is the issue with this model? | iOS Swift

iOS Swift - Local Data Persistence

Examine the following SwiftData model declaration:

@Model class Event {
  var date: Date
  var location: String?
}

What is the issue with this model?

AThe class must inherit from NSObject to be a valid model.

BOptional properties are not allowed in SwiftData models.

CThe model is missing an explicit initializer for its properties.

DThe @Model attribute cannot be applied to classes with more than one property.

Step-by-Step Solution

Solution:

Step 1: Understand SwiftData model requirements
SwiftData models marked with @Model require all stored properties to be initialized either with default values or via an explicit initializer.
Step 2: Analyze the given code
The class Event declares two properties: date (non-optional) and location (optional). However, no initializer is provided, and no default values are assigned.
Step 3: Identify the error
Since date is non-optional and lacks a default value, the compiler expects an initializer to set it. Without it, the model is incomplete and will cause a compile-time error.
Final Answer:
The model is missing an explicit initializer for its properties. -> Option C
Quick Check:
Non-optional properties need initialization [OK]

Quick Trick: Non-optional properties require initializers or defaults [OK]

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