scala – 没有实现play.api.db.slick.DatabaseConfigProvider绑定

2019年7月21日 256次阅读

我无法使用Play 2.5.x进行操作

我收到以下运行时错误：

ProvisionException: Unable to provision, see the following errors:

1) No implementation for play.api.db.slick.DatabaseConfigProvider was bound.
  while locating play.api.db.slick.DatabaseConfigProvider

我的DAO看起来像：

@Singleton
class UserDAO @Inject() (protected val dbConfigProvider: DatabaseConfigProvider) 
extends HasDatabaseConfigProvider[JdbcProfile] {
    import driver.api._

...

}

我只是将它注入我的控制器中,如：

@Singleton
class UserController @Inject() (ws: WSClient, cache: CacheApi, userDAO: UserDAO) extends Controller {
...
}

build.sbt

scalaVersion := "2.11.7"

libraryDependencies ++= Seq(
  cache,
  ws,
  "org.scalatestplus.play" %% "scalatestplus-play" % "1.5.1" % Test,
  // database
  jdbc,
  "org.postgresql"     %  "postgresql" % "9.3-1102-jdbc41",
  "com.typesafe.play" %% "play-slick" % "2.0.0"
)

我的application.conf有：

play.db {
  # The combination of these two settings results in "db.default" as the
  # default JDBC pool:
  #config = "db"
  #default = "default"

  # Play uses HikariCP as the default connection pool.  You can override
  # settings by changing the prototype:
  prototype {
    # Sets a fixed JDBC connection pool size of 50
    #hikaricp.minimumIdle = 50
    #hikaricp.maximumPoolSize = 50
  }
}

## JDBC Datasource
db {
  default.driver = org.postgresql.Driver
  default.url = "jdbc:postgresql://localhost/testdb_development"
  default.username = "blankman"
  #default.password = ""
}

如果我更改了我的数据库名称,则会出现连接错误,因此池正在正确地获取我的配置设置.

最佳答案 我可以在您的application.conf中看到的一个问题是它错过了播放特定的配置键.实际上,您应该从application.conf中删除db部分,并将其替换为slick.dbs,如
https://www.playframework.com/documentation/2.5.x/PlaySlick#database-configuration所示

您可能想要做的另一件事是从sbt构建文件中删除jdbc依赖项,据我所知(基于Play 2.4.x),您不能在同一个Play项目中同时使用play-slick和jdbc.

我绝对建议您阅读Play-Slick文档以更好地了解它的工作原理.

希望这可以帮助！

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