sql-server - 使用 Play 和 Slick 连接到 MSSQL(jtds)

Question

我有一个使用 Play 2.1.1、slick 和 MySQL 完成的项目已经完成了大约一个月。现在我需要将其转移到 MSSQL，但我遇到了一些问题。

我的应用程序编译正常，并找到驱动程序，但每当我尝试建立连接时，我都会收到 [RuntimeException: java.lang.ExceptionInInitializerError]在网站上，我的控制台中更详细的错误是:

play.api.Application$$anon$1: Execution exception[[RuntimeException: java.lang.ExceptionInInitializerError]]
    at play.api.Application$class.handleError(Application.scala:289) ~[play_2.10.jar:2.1.1]
    at play.api.DefaultApplication.handleError(Application.scala:383) ~[play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:326) ~[play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:324) ~[play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) ~[play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) ~[play_2.10.jar:2.1.1]java.lang.RuntimeException: java.lang.ExceptionInInitializerError
    at play.api.mvc.ActionBuilder$$anon$1.apply(Action.scala:222) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.utils.Threads$.withContextClassLoader(Threads.scala:18) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5.apply(Action.scala:108) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5.apply(Action.scala:106) ~[play_2.10.jar:2.1.1]Caused by: java.lang.ExceptionInInitializerError: null
    at controllers.Application$$anonfun$addLicense$1.apply(Application.scala:18) ~[na:na]
    at controllers.Application$$anonfun$addLicense$1.apply(Application.scala:17) ~[na:na]
    at play.api.mvc.ActionBuilder$$anon$1.apply(Action.scala:217) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.utils.Threads$.withContextClassLoader(Threads.scala:18) ~[play_2.10.jar:2.1.1]
Caused by: play.api.Configuration$$anon$1: Configuration error[Slick error : Unknown jdbc driver found in application.conf: [net.sourceforge.jtds.jdbc.Driver]]
    at play.api.Configuration$.play$api$Configuration$$configError(Configuration.scala:80) ~[play_2.10.jar:2.1.1]
    at play.api.Configuration.reportError(Configuration.scala:558) ~[play_2.10.jar:2.1.1]
    at play.api.db.slick.Config$.driver(Config.scala:21) ~[play-slick_2.10-0.3.3.jar:0.3.3]
    at play.api.db.slick.Config$.driver$lzycompute(Config.scala:7) ~[play-slick_2.10-0.3.3.jar:0.3.3]
    at play.api.db.slick.Config$.driver(Config.scala:7) ~[play-slick_2.10-0.3.3.jar:0.3.3]
    at models.License$.<init>(License.scala:38) ~[na:na]

我发现的最有趣的事情是这一行:

Caused by: play.api.Configuration$$anon$1: Configuration error[Slick error : Unknown jdbc driver found in application.conf: [net.sourceforge.jtds.jdbc.Driver]]

它找到了驱动程序，因为如果我输入错误的名称，它会给我一个错误；输入它不会。我的 lib 中有 jtds 驱动程序目录。

我也在启动时连接到数据库

[info] play - database [default] connected at jdbc:jtds:sqlserver://ServerAddress/EGLC

一些额外的信息:

application.conf :

db.default.url="jdbc:jtds:sqlserver://ServerAddress/EGLC"
db.default.driver=net.sourceforge.jtds.jdbc.Driver
db.default.user="sa"
db.default.password="pass"
slick.default="models.*"

Build.scala :

val appDependencies = Seq(
// Add your project dependencies here,
jdbc,
"mysql" % "mysql-connector-java" % "5.1.25",
"net.sourceforge.jtds" % "jtds" % "1.3.1",
"com.typesafe.play" %% "play-slick" % "0.3.3"
)

编辑 当我刷新页面时，虽然我得到了一个不同的异常，但出现了一组甚至没有提到 jtds 的新错误

play.api.Application$$anon$1: Execution exception[[RuntimeException: java.lang.NoClassDefFoundError: Could not initialize class models.Location$]]
    at play.api.Application$class.handleError(Application.scala:289) ~[play_2.10.jar:2.1.1]
    at play.api.DefaultApplication.handleError(Application.scala:383) ~[play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:326) ~[play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:324) ~[play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) ~[play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) ~[play_2.10.jar:2.1.1]java.lang.RuntimeException: java.lang.NoClassDefFoundError: Could not initialize class models.Location$
    at play.api.mvc.ActionBuilder$$anon$1.apply(Action.scala:222) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.utils.Threads$.withContextClassLoader(Threads.scala:18) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5.apply(Action.scala:108) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5.apply(Action.scala:106) ~[play_2.10.jar:2.1.1]
Caused by: java.lang.NoClassDefFoundError: Could not initialize class models.Location$
    at controllers.Application$$anonfun$locations$1$$anonfun$apply$12$$anonfun$apply$13.apply(Application.scala:47) ~[na:na]
    at controllers.Application$$anonfun$locations$1$$anonfun$apply$12$$anonfun$apply$13.apply(Application.scala:46) ~[na:na]
    at controllers.Secured$$anonfun$IsAuthenticated$3$$anonfun$apply$3.apply(Auth.scala:38) ~[na:na]
    at controllers.Secured$$anonfun$IsAuthenticated$3$$anonfun$apply$3.apply(Auth.scala:38) ~[na:na]
    at play.api.mvc.ActionBuilder$$anon$1.apply(Action.scala:217) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]

Answer 1

play-slick 不知道 jTDS driver .虽然总体上很光滑supports SQL server , 玩得不亦乐乎 makes a connection from driver class name to Slick driver :

private def driverByName : String => Option[ExtendedDriver] = Map(
   "org.apache.derby.jdbc.EmbeddedDriver" -> DerbyDriver
   ,"org.h2.Driver" -> H2Driver
   ,"org.hsqldb.jdbcDriver" -> HsqldbDriver
   ,"com.mysql.jdbc.Driver" -> MySQLDriver
   ,"org.postgresql.Driver" -> PostgresDriver
   ,"org.sqlite.JDBC" -> SQLiteDriver
   ,"com.microsoft.sqlserver.jdbc.SQLServerDriver" -> SQLServerDriver
).get(_)

如您所见，支持 Microsoft 的驱动程序，而不支持 jTDS。您现在可以使用 Microsoft 的 JDBC 驱动程序或修改 play-slick。改变很简单。只需添加行

,"net.sourceforge.jtds.jdbc.Driver" -> SQLServerDriver

它应该工作。

我见过issue that you have raised在项目的 GitHub 页面上。我已发送 pull request that should resolve this issue .也许它会被纳入 play-slick 的下一个版本。