我目前正在玩Play和Play-slick。以下代码给出了错误
class GenericRepository(protected val dbConfigProvider: DatabaseConfigProvider) extends HasDatabaseConfigProvider[JdbcProfile] {
import driver.api._
implicit val localDateTimeColumnType = MappedColumnType.base[LocalDateTime, Timestamp](
d => Timestamp.from(d.toInstant(ZoneOffset.ofHours(0))),
d => d.toLocalDateTime
)
protected trait GenericTable {
this: Table[_] =>
def id = column[Long]("id", O.PrimaryKey, O.AutoInc)
def createdAt = column[LocalDateTime]("created_at")
def updatedAt = column[LocalDateTime]("updated_at")
}
protected class CrudRepository[T <: AbstractTable[_] with GenericRepository#GenericTable](private val tableQuery: TableQuery[T]) {
def all = db.run(tableQuery.to[List].result)
def create(obj: T#TableElementType) = db.run(tableQuery returning tableQuery.map(_.id) += obj)
def delete(id: Long) = db.run(tableQuery.filter(_.id === id).delete)
}
}
错误:
value delete is not a member of slick.lifted.Query[T,T#TableElementType,Seq]
我已经google了很多,但没有解决方案适合我。例如,我尝试更换&#39; import driver.api。&#39;使用&#39; import slick.driver.H2Driver.api。&#39;没有任何运气。
我正在使用Scala 2.11.7和Play-slick 2.0.2以及Play 2.5。
答案 0 :(得分:2)
编辑:从您粘贴的代码中我现在看到了您的问题。
只需将您的定义更改为(我只更改了类型参数):
protected class CrudRepository[E, T <: Table[E] with GenericRepository#GenericTable](private val tableQuery: TableQuery[T]) {
def all = db.run(tableQuery.to[List].result)
def create(obj: T#TableElementType) = db.run(tableQuery returning tableQuery.map(_.id) += obj)
def delete(id: Long) = db.run(tableQuery.filter(_.id === id).delete)
}
其中Table
为slick.relational.RelationalProfile.API.Table
。
然后以下列方式实例化您的CrudRepository
:
val crud = new CrudRepository[Redirect,RedirectsTable](Redirects)
Otherthan,它看起来很好。