Question

我正在尝试使用jdbc从Play for Scala控制器读取和写入远程MySQL数据库，并且SBT在运行时显示错误：

＆＃34;表＆＃39; {dbname} .token＆＃39;不存在＆＃34;

尽管出现此错误，但SQL调用（选择）仍按预期完成。

我的问题是：

这是什么标记＆＃39;表格，我为什么要这样做？
有没有办法可以关闭“令牌”的要求＆＃39;表

我用Google搜索了这个并没有找到答案，或者确实是关于这个令牌表的任何内容。

详情如下：

版本：

scala 2.11.6
play 2.2.6

application.conf中的相关配置：

evolutionplugin=disabled
db.default.driver=com.mysql.jdbc.Driver
db.default.url="jdbc:mysql://152.135.194.149/mydb"
db.default.user=someuser
db.default.password="somepassword"

控制器的相关部分：

import play.api.db._
import play.api.Play.current
def test = Action {

  DB.withConnection { conn =>
    val stm = conn.createStatement()
    val res = stm.executeQuery("""
    SELECT  *
    FROM    sometable
    """.stripMargin)

    while (res.next()) {
      // this println succeeds in showing the selected data
      println(res.getString(1), res.getString(2), res.getString(3), res.getString(4))
    }

  }

  Status(200)("good enough")
} // test

完整错误消息：

[ERROR] [11/15/2017 16:31:43.041] [play-akka.actor.default-dispatcher-3] [TaskInvocation] Table 'mydb.token' doesn't exist
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'mydb.token' doesn't exist
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.Util.getInstance(Util.java:386)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2825)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2156)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2459)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2376)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2360)
    at com.jolbox.bonecp.PreparedStatementHandle.executeUpdate(PreparedStatementHandle.java:205)
    at anorm.Sql$class.executeUpdate(Anorm.scala:473)
    at anorm.SqlQuery.executeUpdate(Anorm.scala:481)
    at service.PgSqlUserService$$anonfun$deleteExpiredTokens$1.apply(PgSqlUserService.scala:521)
    at service.PgSqlUserService$$anonfun$deleteExpiredTokens$1.apply(PgSqlUserService.scala:512)
    at play.api.db.DBApi$class.withConnection(DB.scala:82)
    at play.api.db.BoneCPApi.withConnection(DB.scala:276)
    at play.api.db.DB$$anonfun$withConnection$3.apply(DB.scala:162)
    at play.api.db.DB$$anonfun$withConnection$3.apply(DB.scala:162)
    at scala.Option.map(Option.scala:145)
    at play.api.db.DB$.withConnection(DB.scala:162)
    at service.PgSqlUserService.deleteExpiredTokens(PgSqlUserService.scala:512)
    at securesocial.core.UserServicePlugin$$anonfun$onStart$1.apply$mcV$sp(UserService.scala:137)
    at akka.actor.Scheduler$$anon$9.run(Scheduler.scala:80)
    at akka.actor.LightArrayRevolverScheduler$$anon$3$$anon$2.run(Scheduler.scala:241)
    at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:42)
    at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

[error] a.d.TaskInvocation - Table 'mydb.token' doesn't exist
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'mydb.token' doesn't exist
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_151]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_151]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_151]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_151]
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[mysql-connector-java-5.1.27.jar:na]
    at com.mysql.jdbc.Util.getInstance(Util.java:386) ~[mysql-connector-java-5.1.27.jar:na]

MySQL用户的权限：

mysql> select Host, User, Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Alter_priv, Super_priv, Create_tmp_table_priv, Create_tablespace_priv from user where Host="%" and User="someuser";
+------+------------+-------------+-------------+-------------+-------------+-------------+-----------+------------+------------+-----------------------+------------------------+
| Host | User       | Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv | Drop_priv | Alter_priv | Super_priv | Create_tmp_table_priv | Create_tablespace_priv |
+------+------------+-------------+-------------+-------------+-------------+-------------+-----------+------------+------------+-----------------------+------------------------+
| %    | someuser   | Y           | Y           | Y           | Y           | Y           | Y         | Y          | Y          | Y                     | Y                      |
+------+------------+-------------+-------------+-------------+-------------+-------------+-----------+------------+------------+-----------------------+------------------------+
1 row in set (0.00 sec)

备注：

我还使用了使用Postgres的Securesocial。
我打算将来能够进化。

非常感谢任何帮助。提前谢谢！

Answer 1

该问题与securesocial竞争db.default配置有关。

由于此项目部署在heroku上，因此db。*配置在Procfile中设置，而不是在application.conf中设置，并设置为在不同的服务器上使用postgres。

在application.conf中重新声明db.default会导致securesocial尝试查询mysql数据库，因此＆＃39;表标记不存在＆＃39;错误。

解决方案是提供非默认的db配置并使用：

application.conf：使用＆＃39; custom＆＃39; （或任何其他字符串）而不是＆＃39;默认＆＃39;

db.custom.driver=com.mysql.jdbc.Driver
db.custom.url="jdbc:mysql://152.135.194.149/mydb"
db.custom.user=someuser
db.custom.password="somepassword"

controller：使用上面的配置

调用withConnection（）

import play.api.db._
import play.api.Play.current
def test = Action {

  // note the 'custom'
  DB.withConnection("custom") { conn =>
    val stm = conn.createStatement()
    val res = stm.executeQuery("""
    SELECT  *
    FROM    sometable
    """.stripMargin)

    while (res.next()) {
      // this println succeeds in showing the selected data
      println(res.getString(1), res.getString(2), res.getString(3), res.getString(4))
    }

  }

  Status(200)("good enough")
} // test

连接到MySql的Scala Play显示运行时错误＆＃34;表＆＃39;令牌＆＃39;不存在＆＃34;

1 个答案: