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# Schema.Relationship.Option

```
struct Option
```

## Topics

### Type Properties

[`static var unique: Schema.Relationship.Option`](/documentation/SwiftData/Schema/Relationship/Option/unique)

Ensures the property’s value is unique across all models of the same type.

## Relationships

### Conforms To

[`Encodable`](/documentation/Swift/Encodable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`Decodable`](/documentation/Swift/Decodable)

---

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