add fromStringOrThrow to Dal

1 files changed, 5 insertions, 0 deletions

diff --git a/src/main/scala/xyz/driver/core/database/Dal.scala b/src/main/scala/xyz/driver/core/database/Dal.scala
index 581bd0f..f9af7fe 100644
--- a/src/main/scala/xyz/driver/core/database/Dal.scala
+++ b/src/main/scala/xyz/driver/core/database/Dal.scala
@@ -1,6 +1,7 @@
 package xyz.driver.core.database
 
 import slick.lifted.AbstractTable
+import xyz.driver.core.rest.errors.DatabaseException
 
 import scala.concurrent.{ExecutionContext, Future}
 import scalaz.{ListT, Monad, OptionT}
@@ -16,6 +17,10 @@ trait Dal {
 
   def customAction[R](action: => OptionT[Future, R]): OptionT[T, R] =
     OptionT[T, R](customAction(action.run))
+
+  implicit def fromStringOrThrow[D](mapper: (String) => Option[D])(msg: String)(fs: String): D = {
+    mapper(fs).getOrElse(throw DatabaseException(msg))
+  }
 }
 
 class FutureDal(executionContext: ExecutionContext) extends Dal {