SQLite 与 Slick and Play
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【中文标题】SQLite 与 Slick and Play【英文标题】:SQLite with Slick and Play 【发布时间】:2016-04-26 16:30:46 【问题描述】:所以我正在尝试修改类型安全激活器模板之一以使用 SQLite 数据库而不是内置的 H2 数据库。这是原始模板https://github.com/playframework/playframework/tree/master/templates/play-scala-intro
我所做的是将 application.conf 文件更改为具有以下几行:
slick.dbs.default.driver=slick.driver.SQLiteDriver
slick.dbs.default.db.driver=org.sqlite.JDBC
slick.dbs.default.db.url="jdbc:sqlite:/home/marcin/play-scala-intro/people.db"
当然,我自己也创建了文件(刚刚创建了touch people.db
)。然后,如果我启动我的应用程序,我会收到以下错误:
[info] ! @6ooe822f0 - Internal server error, for (GET) [/] ->
[info]
[info] play.api.Configuration$$anon$1: Configuration error[Cannot connect to database [default]]
[info] at play.api.Configuration$.configError(Configuration.scala:178) ~[play_2.11-2.4.6.jar:2.4.6]
[info] at play.api.Configuration.reportError(Configuration.scala:829) ~[play_2.11-2.4.6.jar:2.4.6]
[info] at play.api.db.slick.DefaultSlickApi$DatabaseConfigFactory.create(SlickApi.scala:93) ~[play-slick_2.11-1.1.1.jar:1.1.1]
[info] at play.api.db.slick.DefaultSlickApi$DatabaseConfigFactory.get$lzycompute(SlickApi.scala:81) ~[play-slick_2.11-1.1.1.jar:1.1.1]
[info] at play.api.db.slick.DefaultSlickApi$DatabaseConfigFactory.get(SlickApi.scala:80) ~[play-slick_2.11-1.1.1.jar:1.1.1]
我正在寻找一些示例,如何像这里一样设置它 https://groups.google.com/forum/#!msg/scalaquery/07JBbnZ5VZk/7D1_5N4uGjsJ
或这里:
https://github.com/playframework/play-slick
但它们与我的代码不够相似,而且由于我对这一切都很陌生,所以我无法真正弄清楚如何使用它们。感谢您的帮助,谢谢!
[编辑]:
根据我在驱动程序名称末尾添加“$”的评论中的建议,conf 文件中的内容现在如下所示:
slick.dbs.default.driver=slick.driver.SQLiteDriver$
slick.dbs.default.db.driver=org.sqlite.JDBC
slick.dbs.default.db.url="jdbc:sqlite:/home/marcin/play-scala-intro/people.db"
这在出现另一个错误的意义上是有效的:
[info] Caused by: java.sql.SQLException: JDBC4 Connection.isValid() method not supported, connection test query must be configured
[info] at com.zaxxer.hikari.pool.BaseHikariPool.addConnection(BaseHikariPool.java:441) ~[HikariCP-java6-2.3.7.jar:na]
[info] at com.zaxxer.hikari.pool.BaseHikariPool$1.run(BaseHikariPool.java:413) ~[HikariCP-java6-2.3.7.jar:na]
[info] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_66]
【问题讨论】:
将slick.driver.SQLiteDriver
更改为 slick.driver.SQLiteDriver$
。如果这没有帮助,请添加堆栈跟踪的根本原因。
感谢您的评论!从某种意义上说,它确实有所帮助,因为我现在遇到了一个不同的错误[info] Caused by: java.sql.SQLException: JDBC4 Connection.isValid() method not supported, connection test query must be configured [info] at com.zaxxer.hikari.pool.BaseHikariPool.addConnection(BaseHikariPool.java:441) ~[HikariCP-java6-2.3.7.jar:na] [info] at com.zaxxer.hikari.pool.BaseHikariPool$1.run(BaseHikariPool.java:413) ~[HikariCP-java6-2.3.7.jar:na] [info] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_66]
也许在您的applicaion.conf
中设置一个测试查询有助于:slick.dbs.default.db.connectionTestQuery="select 1"
。
离题:在 SO 上,通常使用新发现来编辑问题,而不是在 cmets 中添加它们。这样其他用户可以更轻松地帮助您解决问题:)
好吧,我想我现在放弃了。您的建议有所帮助,但我遇到了其他问题,现在它并不是项目的重要组成部分。感谢您的帮助
【参考方案1】:
是的,这是一个很老的问题,但也许答案对某人有用。
所有作品均基于此处提供的示例: https://developer.lightbend.com/start/?group=play&project=play-samples-play-scala-slick-example
我已经使用 Scala/Play/Slick 成功运行 SQLite 数据库,执行以下步骤:
-
build.sbt 文件:
lazy val root = (project in file("."))
.enablePlugins(PlayScala)
.settings(
name := """Application""",
version := "2.8.x",
scalaVersion := "2.13.1",
libraryDependencies ++= Seq(
guice,
"org.playframework.anorm" %% "anorm" % "2.6.5",
"com.typesafe.play" %% "play-slick" % "5.0.0",
"com.typesafe.play" %% "play-slick-evolutions" % "5.0.0",
"org.xerial" % "sqlite-jdbc" % "3.31.1",
specs2 % Test,
),
scalacOptions ++= Seq(
"-feature",
"-deprecation",
"-Xfatal-warnings"
)
)
-
application.conf
slick.dbs.default.profile="slick.jdbc.SQLiteProfile$"
slick.dbs.default.db.profile="slick.driver.SQLiteDriver"
slick.dbs.default.db.url="jdbc:sqlite:/mnt/comments.db"
slick.dbs.default.db.driver=org.sqlite.JDBC
请注意,它也适用于相对路径:
slick.dbs.default.profile="slick.jdbc.SQLiteProfile$"
slick.dbs.default.db.profile="slick.driver.SQLiteDriver"
slick.dbs.default.db.url="jdbc:sqlite:./comments.db"
slick.dbs.default.db.driver=org.sqlite.JDBC
Play Evolution 也可以:
play.evolutions
db.default.enabled = true
【讨论】:
【参考方案2】:我有 play、slick、SQLite 项目:https://github.com/aukgit/scala-open-real-time-bidding-rtb
它还有一个存储库模式。
请查看https://github.com/aukgit/scala-open-real-time-bidding-rtb/releases/tag/v0.0.5
举一个例子来说明 slick 如何与 SQLite 一起工作:
import slick.jdbc.SQLiteProfile.api._ // must import
lazy val db = Database.forURL(url = AbsoluteDatabasePath)
slick 的存储库模式 https://github.com/aukgit/scala-open-real-time-bidding-rtb/tree/6bf6beb6adb93b83cba49085d2d33269502189e1/app/shared/com/repository
您可以下载该版本中的 repo 并使用 SBT 运行它
run sbt
或使用 IntelliJ IDEA 打开
Play 的路由器示例 (https://github.com/aukgit/scala-open-real-time-bidding-rtb/blob/6bf6beb6adb93b83cba49085d2d33269502189e1/app/controllers/controllerRoutes/routerGeneric/RtbServiceBasicRouter.scala)
class RtbServiceBasicRouter @Inject()(
controller : RequestSimulatorServiceApiController)
extends SimpleRouter
val routingActionWrapper : ControllerGenericActionWrapper = ControllerGenericActionWrapper(
ControllerDefaultActionType.Routing)
override def routes : Routes =
try
case GET(p"/serviceName") | GET(p"/") =>
controller.getServiceName()
case GET(p"/commands") | GET(p"/available-commands") | GET(p"/routes") =>
controller.getAvailableCommands()
case GET(p"/bannerRequest") =>
controller.getBannerRequestSample()
catch
case e : Exception =>
controller.handleError(e, routingActionWrapper)
throw e
将路由控制器添加到路由 (https://github.com/aukgit/scala-open-real-time-bidding-rtb/blob/6bf6beb6adb93b83cba49085d2d33269502189e1/conf/routes)
-> /services/v1/rtbSimulateService controllers.controllerRoutes.routerGeneric.RtbServiceBasicRouter
SBT 包: https://github.com/aukgit/scala-open-real-time-bidding-rtb/blob/6bf6beb6adb93b83cba49085d2d33269502189e1/build.sbt
SBT 中 Sqlite 的推荐包:
"org.joda" % "joda-convert" % "2.2.1", // for time convert
"com.github.tototoshi" %% "slick-joda-mapper" % "2.4.2", // 2.4 doesn't work
"joda-time" % "joda-time" % "2.7",
"org.xerial" % "sqlite-jdbc" % "3.30.1", // sqlite driver
如果您想集成,请使用 Slick Packages:
"com.typesafe.slick" %% "slick" % "3.3.2",
"com.typesafe.slick" %% "slick-codegen" % "3.3.2", // for generating Table schema for sqlite db
sqlite db 到表模式生成示例(数据库优先方法)[https://github.com/aukgit/scala-open-real-time-bidding-rtb/blob/6bf6beb6adb93b83cba49085d2d33269502189e1/app/shared/com/ortb/executors/DatabaseEngineCodeGenerator.scala]:
slick.codegen.SourceCodeGenerator.run(
profile = databaseGenerateConfig.profile,// "slick.jdbc.SQLiteProfile",
jdbcDriver = databaseGenerateConfig.jdbcDriver, //"org.sqlite.JDBC",
url = databaseGenerateConfig.compiledDatabaseUrl, //
// "jdbc:sqlite:D:\\PersonalWork\\Github\\scala-rtb-example\\src\\main\\resources\\openRTBSample.db",
outputDir = databaseGenerateConfig.compiledOutputDir, //
// "D:\\PersonalWork\\Github\\scala-rtb-example\\src\\main\\scala\\com\\ortb\\persistent\\schema",
pkg = databaseGenerateConfig.pkg,
user = None,
password = None,
ignoreInvalidDefaults = true,
outputToMultipleFiles = false
)
【讨论】:
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