当尝试从 my 获取第一行时transaction
,我收到一个错误:
java.lang.IllegalStateException:上下文中没有事务。
我的代码如下所示:
fun loadPlayer(client: Client): PlayerLoadResult {
var player = transaction {
PlayerModel.select {
PlayerModel.username eq client.loginUsername
}
}.firstOrNull() ?: return PlayerLoadResult.NEW_ACCOUNT
// ...
return PlayerLoadResult.LOAD_ACCOUNT
}
我的PlayerModel
样子是这样的:
object PlayerModel : Table("Players") {
val id = integer("id").autoIncrement().primaryKey()
val username = varchar("username", 60).uniqueIndex()
val displayName = varchar("display_name", 60).uniqueIndex()
val x = integer("position_x")
val height = integer("position_y")
val z = integer("position_z")
val privilege = integer("privilege").default(1)
val runEnergy = float("run_energy").default(100.toFloat())
val displayMode = integer("display_mode").default(0)
val hash = varchar("password_hash", 60)
val xteaKeyOne = integer("xtea_one")
val xteaKeyTwo = integer("xtea_two")
val xteaKeyThree = integer("xtea_three")
val xteaKeyFour = integer("xtea_four")
}
我的完整堆栈跟踪如下所示:
java.lang.IllegalStateException: No transaction in context.
at org.jetbrains.exposed.sql.transactions.TransactionManager$Companion.current(TransactionApi.kt:89) ~[exposed-0.13.6.jar:?]
at org.jetbrains.exposed.sql.Query.getTransaction(Query.kt:93) ~[exposed-0.13.6.jar:?]
at org.jetbrains.exposed.sql.Query.flushEntities(Query.kt:299) ~[exposed-0.13.6.jar:?]
at org.jetbrains.exposed.sql.Query.iterator(Query.kt:303) ~[exposed-0.13.6.jar:?]
at kotlin.collections.CollectionsKt___CollectionsKt.firstOrNull(_Collections.kt:219) ~[kotlin-stdlib-1.3.21.jar:1.3.21-release-158 (1.3.21)]
at gg.rsmod.plugins.service.sql.controllers.PlayerLoadController.loadPlayer(PlayerLoadController.kt:38) ~[plugins-0.0.4.jar:?]
at gg.rsmod.plugins.service.sql.SQLService.loadClientData(SQLService.kt:104) ~[plugins-0.0.4.jar:?]
at gg.rsmod.game.service.login.LoginWorker.run(LoginWorker.kt:28) [main/:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_211]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_211]
获取第一行似乎有什么问题?这个查询应该只返回一行,而不是多行。