Scala Slick3与SQLite-自动提交似乎不起作用
我正在尝试使用Slick为SQLite数据库编写一些基本查询 这是我的密码:Scala Slick3与SQLite-自动提交似乎不起作用,scala,sqlite,slick,Scala,Sqlite,Slick,我正在尝试使用Slick为SQLite数据库编写一些基本查询 这是我的密码: class MigrationLog(name: String) { val migrationEvents = TableQuery[MigrationEventTable] lazy val db: Future[SQLiteDriver.backend.DatabaseDef] = { val db = Database.forURL(s"jdbc:sqlite:$name.d
class MigrationLog(name: String) {
val migrationEvents = TableQuery[MigrationEventTable]
lazy val db: Future[SQLiteDriver.backend.DatabaseDef] = {
val db = Database.forURL(s"jdbc:sqlite:$name.db", driver = "org.sqlite.JDBC")
val setup = DBIO.seq(migrationEvents.schema.create)
val createFuture = for {
tables <- db.run(MTable.getTables)
createResult <- if (tables.length == 0) db.run(setup) else Future.successful()
} yield createResult
createFuture.map(_ => db)
}
val addEvent: (String, String) => Future[String] = (aggregateId, eventType) => {
val id = java.util.UUID.randomUUID().toString
val command = DBIO.seq(migrationEvents += (id, aggregateId, None, eventType, "CREATED", System.currentTimeMillis, None))
db.flatMap(_.run(command).map(_ => id))
}
val eventSubmitted: (String, String) => Future[Unit] = (id, batchId) => {
val q = for { e <- migrationEvents if e.id === id } yield (e.batchId, e.status, e.updatedAt)
val updateAction = q.update(Some(batchId), "SUBMITTED", Some(System.currentTimeMillis))
db.map(_.run(updateAction))
}
val eventMigrationCompleted: (String, String, String) => Future[Unit] = (batchId, id, status) => {
val q = for { e <- migrationEvents if e.batchId === batchId && e.id === id} yield (e.status, e.updatedAt)
val updateAction = q.update(status, Some(System.currentTimeMillis))
db.map(_.run(updateAction))
}
val allEvents = () => {
db.flatMap(_.run(migrationEvents.result))
}
}
类迁移日志(名称:String){
val migrationEvents=TableQuery[MigrationEventTable]
lazy val db:Future[SQLiteDriver.backend.DatabaseDef]={
val db=Database.forURL(s“jdbc:sqlite:$name.db”,driver=“org.sqlite.jdbc”)
val setup=DBIO.seq(migrationEvents.schema.create)
val createFuture=for{
未来表格[String]=(aggregateId,eventType)=>{
val id=java.util.UUID.randomUUID().toString
val命令=DBIO.seq(migrationEvents+=(id,aggregateId,None,eventType,“CREATED”,System.currentTimeMillis,None))
db.flatMap(wk.run(command.map(=>id))
}
val eventSubmitted:(String,String)=>Future[Unit]=(id,batchId)=>{
val q=对于{e Future[Unit]=(批处理id、id、状态)=>{
val q=对于{e{
db.flatMap(u.run(migrationEvents.result))
}
}
以下是我如何使用它:
val migrationLog = MigrationLog("test")
val events = for {
id <- migrationLog.addEvent("aggregateUserId", "userAccessControl")
_ <- migrationLog.eventSubmitted(id, "batchID_generated_from_idam")
_ <- migrationLog.eventMigrationCompleted("batchID_generated_from_idam", id, "Successful")
events <- migrationLog.allEvents()
} yield events
events.map(_.foreach(event => event match {
case (id, aggregateId, batchId, eventType, status, submitted, updatedAt) => println(s"$id $aggregateId $batchId $eventType $status $submitted $updatedAt")
}))
val migrationLog=migrationLog(“测试”)
val事件=用于{
id发现问题出在db.map(u.run(updateAction))
上,它返回Future[Future[Int]]
,这意味着在我尝试运行另一个查询时命令还没有完成
将其替换为db.flatMap(u.run(updateAction))
解决了这个问题。结果表明问题出在db.map(u.run(updateAction))
上,它返回Future[Future[Int]]
,这意味着在我尝试运行另一个查询时命令尚未完成
将其替换为db.flatMap(u.run(updateAction))
解决了这个问题