Provide support for phantom-dsl

Instead of writing CQL queries in lagom projects it would be nice if we could use phantom-dsl (see https://github.com/outworkers/phantom) and use the lagom infrastructure for the Cassandra session management.

The benefits: The dsl provides a type safe way on querying and writing into the Cassandra database, for example:

case class DomainObject(id: UUID, description: String)

abstract class DomainObjects extends Table[DomainObjects, DomainObject] {
  object id extends UUIDColumn with PartitionKey
  object description extends StringColumn

  def getById(id: UUID): Future[Option[DomainObject]] = {
    select.where(_.id eqs id).one()
  }
}

[WayneWang12]

quill-cassandra-lagom is released! Add libraryDependencies += "io.getquill" %% "quill-cassandra-lagom" % "3.1.0" to your build.sbt, then create a context in your application definition:

  lazy val quillContext: CassandraLagomAsyncContext[SnakeCase]        = wire[CassandraLagomAsyncContext[SnakeCase]]
  lazy val quillStreamContext: CassandraLagomStreamContext[SnakeCase] = wire[CassandraLagomStreamContext[SnakeCase]]

It will reuse Lagom’s cassandra session automatically. Then you can use it in quill way in your code:

    import ctx._
    val q = quote(
      query[AnalysisEvent]
        .filter(evt =>
          evt.tenantId == lift(tenantId) &&
            evt.userSetId == lift(userSetId)))
    ctx.run(q)

If you are using CassandraLagomAsyncContext, result will be Future[List[AnalysisEvent]]; if CassandraLagomStreamContext, result will be Source[AnalysisEvent, NotUsed].

[WayneWang12]

@ihostage I’m communicating with them. If they don’t accept, I’ll create my own project.

Luckily one of quill’s maintainers @jilen is Chinese. I can talk to him directly in native language.