select<R> method

Creates a derived query that selects a subset of data.

The derived query shares the lifecycle and state of this query, but only updates its data when the selected value changes.

Important: The returned query listens to the source query. You should dispose it when no longer needed to prevent memory leaks, especially if created inside a build method.

Example:

// In a controller
late final nameQuery = userQuery.select((user) => user.name);

@override
void onClose() {
  nameQuery.dispose();
  super.onClose();
}