Structuregrdb 7.3.0GRDB
Trace
A ValueReducer that handles ValueObservation events.
struct Trace<Base> where Base : ValueReducerA ValueReducer that handles ValueObservation events.
struct Trace<Base> where Base : ValueReducerimport GRDBA toolkit for SQLite databases, with a focus on application development
enum ValueReducersA namespace for concrete types that adopt the ValueReducer protocol.
struct ValueObservation<Reducer> where Reducer : ValueReducerValueObservation tracks changes in the results of database requests, and notifies fresh values whenever the database changes.
protocol ValueReducer : _ValueReducerValueReducer supports ValueObservation.
func handleEvents(willStart: (() -> Void)? = nil, willFetch: (() -> Void)? = nil, willTrackRegion: ((DatabaseRegion) -> Void)? = nil, databaseDidChange: (() -> Void)? = nil, didReceiveValue: ((Reducer.Value) -> Void)? = nil, didFail: ((Error) -> Void)? = nil, didCancel: (() -> Void)? = nil) -> ValueObservation<ValueReducers.Trace<Reducer>> Performs the specified closures when observation events occur.
func print(_ prefix: String = "", to stream: sending TextOutputStream? = nil) -> ValueObservation<ValueReducers.Trace<Reducer>> Prints log messages for all observation events.
struct Fetch<Value> where Value : SendableA ValueReducer that perform database fetches.
struct Map<Base, Value> where Base : _ValueReducer, Value : SendableA ValueReducer whose values consist of those in a Base reducer passed through a transform function.
struct RemoveDuplicates<Base> where Base : ValueReducerA ValueReducer that notifies only values that don’t match the previously observed value.
protocol _ValueReducerImplementation details of ValueReducer.
func _makeFetcher() -> _Fetcher mutating func _value(_ fetched: Base.Fetcher.Value) throws -> Base.Value? struct _Fetcher