DatabaseReader

extension DatabaseReader

Combine extensions on DatabaseReader.


                    
                    
                    readPublisher(value:)

Returns a Publisher that asynchronously completes with a fetched value.

// DatabasePublishers.Read<[Player]>
let players = dbQueue.readPublisher { db in
    try Player.fetchAll(db)
}

Its value and completion are emitted on the main dispatch queue.

Declaration

Swift

public func readPublisher<Output>(
    value: @escaping (Database) throws -> Output)
    -> DatabasePublishers.Read<Output>

Parameters


                                value

A closure which accesses the database.

Show on GitHub


                    
                    
                    readPublisher(receiveOn:value:)

Returns a Publisher that asynchronously completes with a fetched value.

// DatabasePublishers.Read<[Player]>
let players = dbQueue.readPublisher(
    receiveOn: DispatchQueue.global(),
    value: { db in try Player.fetchAll(db) })

Its value and completion are emitted on scheduler.

Declaration

Swift

public func readPublisher<S, Output>(
    receiveOn scheduler: S,
    value: @escaping (Database) throws -> Output)
    -> DatabasePublishers.Read<Output>
    where S : Scheduler

Parameters

`scheduler`	A Combine Scheduler.
`value`	A closure which accesses the database.

Show on GitHub