我正在尝试使用 doobie、http4s 和 circe 建立一个带有数据库的简单 scala 应用程序。
如何将 java.util.UUID 转换为 doobie.syntax.SqlInterpolator.SingleFragment ?
final case class User(id: UUID, details: UserDetails)
implicit val userDecoder: Decoder[User] = deriveDecoder[User]
implicit def userEntityDecoder[F[_]: Sync]: EntityDecoder[F, User] = jsonOf
implicit val userEncoder: Encoder[User] = deriveEncoder[User]
implicit def userEntityEncoder[F[_]: Applicative]: EntityEncoder[F, User] = jsonEncoderOf
implicit val put: Put[User] =
Put[Json].contramap(_.asJson)
implicit val get: Get[User] =
Get[Json].temap(_.as[User].left.map(_.show))
[info] welcome to sbt 1.3.12 (N/A Java 14.0.1)
[info] loading global plugins from /Users/ryan/.sbt/1.0/plugins
[info] loading settings for project bobbymoore-build from plugins.sbt ...
[info] loading project definition from /Users/ryan/fullStackRyan/bobbymoore/project
[info] loading settings for project root from build.sbt ...
[info] set current project to bobbymoore (in build file:/Users/ryan/fullStackRyan/bobbymoore/)
[info] sbt server started at local:///Users/ryan/.sbt/1.0/server/90f560b1e0964865fc4c/sock
sbt:bobbymoore> compile
[info] Compiling 1 Scala source to /Users/ryan/fullStackRyan/bobbymoore/target/scala-2.13/classes ...
[error] /Users/ryan/fullStackRyan/bobbymoore/src/main/scala/com/c/bobbymoore/database/UserQueries.scala:24:20: type mismatch;
[error] found : java.util.UUID
[error] required: doobie.syntax.SqlInterpolator.SingleFragment
[error] | ${user.id},
[error] ^
[error] /Users/ryan/fullStackRyan/bobbymoore/src/main/scala/com/c/bobbymoore/database/UserQueries.scala:34:21: type mismatch;
[error] found : java.util.UUID
[error] required: doobie.syntax.SqlInterpolator.SingleFragment
[error] |WHERE id=$id
[error] ^
[error] two errors found
[error] (Compile / compileIncremental) Compilation failed
[error] Total time: 2 s, completed 13 Oct 2020, 16:31:46