what is the difference between @Transient and @Attribute(.ephemeral)
Generated on 8/9/2024
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In the context of SwiftData, @Transient and @Attribute(.ephemeral) are used to manage how data is persisted in your models.
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@Transient: This is used to mark a stored property in a model as transient, meaning that the data for this property will not be persisted. It is useful when you have data that is only needed temporarily and does not need to be saved to the database. -
@Attribute(.ephemeral): This is a modifier used to mark attributes in a persistent model that should be preserved even when the model is deleted. These attributes are preserved as tombstone values, allowing you to process history information for deleted models. This is particularly useful when you need to retain certain information for historical tracking or auditing purposes.
Both of these features are part of the customization options available in SwiftData to manage how data is stored and maintained over time. For more details, you can refer to the session What’s new in SwiftData (02:43).
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What’s new in SwiftData
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