小编Azi*_*zik的帖子

我在使用Playframework中运行测试时遇到 进化问题未知数据类型：“ JSONB”

• 适用于Scala的playframework v2.6.6
• 畅玩v3.0.2
• play-slick-evolutions v3.0.2
• PostgreSQL-42.0.0
• h2database-1.4.194

我的H2DbConnector看起来像这样：

import entities.StubData._
import org.scalatest.{BeforeAndAfterAll, FunSuite}
import play.api.db.DBApi
import play.api.db.evolutions.Evolutions
import play.api.inject.guice.GuiceApplicationBuilder

trait H2DbConnector extends FunSuite with BeforeAndAfterAll {
  val appBuilder = new GuiceApplicationBuilder()
    .configure(configuration)

  val injector = appBuilder.injector
  lazy val databaseApi = injector.instanceOf[DBApi]

  override def beforeAll() = {
    Evolutions.applyEvolutions(databaseApi.database("default"))
  }

  override def afterAll() = {
    Evolutions.cleanupEvolutions(databaseApi.database("default"))
  }
}

在application.test.conf中

slick.dbs.default.driver = "slick.driver.H2Driver$"
slick.dbs.default.db.driver = "org.h2.Driver"
slick.dbs.default.db.url = "jdbc:h2:mem:play;MODE=PostgreSQL;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=FALSE"

我在Evolutions 2.sql文件中有一条问题线

ALTER TABLE "Messages" ADD COLUMN "metaJson" JSONB NULL; …

我在删除元组数据集中的重复行时遇到麻烦 Dataset[(LeftDs, RightDs)]

试图像这样连接两个数据集：

val comparableDs = leftDs.joinWith(
   rightDs,
   fuzzyMatch(leftDs.col("name"), rightDs.col("officialName"))
)

我想删除两个字段的重复项：

val resultDs = comparableDs.dropDuplicates("_1.name", "_2.officialName")

但是得到这个错误： Cannot resolve column name "_1.name" among (_1, _2);

这是以下内容的架构comparableDs：

root
 |-- _1: struct (nullable = false)
 |    |-- id: string (nullable = true)
 |    |-- name: string (nullable = true)
 |-- _2: struct (nullable = false)
 |    |-- id: string (nullable = true)
 |    |-- category: string (nullable = true)
 |    |-- officialName: string (nullable = true)

如何dropDuplicates …