Enumerationgrdb 7.3.0GRDB
SharedValueObservationExtent
The extent of the shared subscription to a SharedValueObservation.
enum SharedValueObservationExtentThe extent of the shared subscription to a SharedValueObservation.
enum SharedValueObservationExtentimport GRDBA toolkit for SQLite databases, with a focus on application development
final class SharedValueObservation<Element> where Element : SendableA shared value observation spares database resources by sharing a single underlying ValueObservation subscription.
case observationLifetimeThe SharedValueObservation starts a single database observation, which stops when the SharedValueObservation is deallocated and all subscriptions terminated.
case whileObservedThe SharedValueObservation stops database observation when the number of subscriptions drops down to zero. Database observation restarts on the next subscription.
func shared(in reader: any DatabaseReader, scheduling scheduler: some ValueObservationScheduler = .async(onQueue: .main), extent: SharedValueObservationExtent = .whileObserved) -> SharedValueObservation<Reducer.Value> Returns a shared value observation that spares database resources by sharing a single underlying ValueObservation subscription.
protocol EquatableA type that can be compared for value equality.
protocol Hashable : EquatableA type that can be hashed into a Hasher to produce an integer hash value.
protocol Sendablestatic func != (lhs: Self, rhs: Self) -> Bool Returns a Boolean value indicating whether two values are not equal.