DatabaseSnapshot
public class DatabaseSnapshot : DatabaseReader
A DatabaseSnapshot sees an unchanging database content, as it existed at the moment it was created.
See DatabasePool.makeSnapshot()
For more information, read about snapshot isolation
at https://sqlite.org/isolation.html
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Synchronously executes a read-only block that takes a database connection, and returns its result.
let players = try snapshot.read { db in try Player.fetchAll(...) }
Throws
The error thrown by the block.Declaration
Swift
public func read<T>(_ block: (Database) throws -> T) rethrows -> T
Parameters
block
A block that accesses the database.
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Declaration
Swift
public func add(function: DatabaseFunction)
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Declaration
Swift
public func remove(function: DatabaseFunction)
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Declaration
Swift
public func add(collation: DatabaseCollation)
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Declaration
Swift
public func remove(collation: DatabaseCollation)
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Declaration
Swift
public func add<Reducer: ValueReducer>( observation: ValueObservation<Reducer>, onError: ((Error) -> Void)?, onChange: @escaping (Reducer.Value) -> Void) throws -> TransactionObserver
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Declaration
Swift
public func remove(transactionObserver: TransactionObserver)