我有一个表定义,其中包含在 Slick 2.1.0 中工作的通用列,但无法使其在 3.0.0 中工作,下面是表结构的详细信息。
abstract class SomeTable[V](tag: Tag, schemaName: String, tableName: String)
extends Table[(String, Int, Date, Timestamp, V)](tag, Some(schemaName), tableName) {
def entityKey = column[String]("ENTITY_KEY")
def someId = column[Int]("SOME_ID")
def someDate = column[Date]("SOME_DATE")
def someTime = column[Timestamp]("SOME_TIME")
def someValue: Rep[V]
def * = (entityKey, someId, someDate, someTime, someValue)
}
错误详情-
[error] found : (slick.lifted.Rep[String], slick.lifted.Rep[Int], slick.lifted.Rep[java.sql.Date], slick.lifted.Rep[java.sql.Timestamp], slick.lifted.Rep[V])
[error] required: slick.lifted.ProvenShape[(String, Int, java.sql.Date, java.sql.Timestamp, V)]
我认为错误的原因是“someValue”,它是通用类型,无法解析为 ProvenShape。
请让我知道解决此错误的任何建议。谢谢。
最佳答案
我有同样的问题,并且能够通过更改为来编译代码:
abstract class SomeTable[V](tag: Tag, schemaName: String, tableName: String)
extends Table[(String, Int, Date, Timestamp, V)](tag, Some(schemaName), tableName) {
def entityKey = column[String]("ENTITY_KEY")
def someId = column[Int]("SOME_ID")
def someDate = column[Date]("SOME_DATE")
def someTime = column[Timestamp]("SOME_TIME")
def someValue: Rep[V]
def *: ProvenShape[(String, Int, Date, Timestamp, V)] = proveShapeOf(entityKey, someId, someDate, someTime, someValue)
}
关于scala - Slick 3.0.0 升级 - 使用通用列类型的默认投影,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30595421/