how can I programmatically observe changes in swift data store without using @query

To programmatically observe changes in a Swift data store without using @query, you can utilize Swift Data's history tracking capabilities. Swift Data history allows you to track changes over time by recording transactions that contain metadata about all changes in the data store. Here's a general approach to achieve this:

1. Fetch Swift Data History: You can start by fetching transactions from the data store. This involves creating a function that retrieves transactions based on a history token and an author. The history token helps in fetching changes that occurred after a specific point in time.

2. Process Changes: Once you have the transactions, you can process the changes by inspecting the properties of each change. This will help you determine which models were inserted, updated, or deleted.

3. Update the User Interface: After processing the changes, you can update your app's UI or any other state that needs to reflect these changes.

For more detailed guidance, you can refer to the session Track model changes with SwiftData history (05:12) where these steps are demonstrated in the context of a sample app.

This approach allows you to efficiently track and respond to changes in your data store without relying on @query.