How can I apply indexing to SwifData?

Generated on 8/1/2024

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To apply indexing to SwiftData, you can use the new index macro. This macro allows you to specify which properties should be indexed to make queries faster and more efficient. Here’s a step-by-step guide on how to do it:

  1. Identify Key Properties: Determine which properties are frequently used in sorting and filtering queries. For example, in a Trips app, you might frequently query trips by name, start date, and end date.

  2. Add the Index Macro: Use the index macro to specify these key properties. You can also create a compound index for multiple properties to further optimize performance for large datasets.

Here is an example of how to apply the index macro:

@Model
struct Trip {
    @Attribute(.index) var name: String
    @Attribute(.index) var startDate: Date
    @Attribute(.index) var endDate: Date
}

In this example, the name, startDate, and endDate properties are indexed, making queries that filter or sort by these properties more efficient.

For more detailed information, you can refer to the session "What’s new in SwiftData" at the timestamp 11:56.

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