Using Salatdao without Case Classes

[Anurag Laddha]

Greetings,

I'm using SalatDAO for reading/writing data from Mongodb (using Casbah)

I'm able to get things to work with case class but not with a regular scala class

// Model

class CollectionFoo(@Key("_id") var fooId: String,

                       @Key("foo") var fooHere : String,

                       @Key("bar") var barHere : Int,

                       @Key("ps") var processStatus : String = "") {

}

//Simple DAO using Salat

object AnuragTestDAO extends SalatDAO[CollectionFoo, String](collection = db.anuragTestCollection) with GenericDAO with DataStoreExceptionWrapper {

  def findItemById(fooId: String) = {

    exceptionWrapper {

      val results = find(ref = MongoDBObject("_id" -> fooId)).toList

      results match {

        case Nil => None

        case x :: xs => Some(x)

      }

    }

  }

}

//Test case using Spec2

@RunWith(classOf[JUnitSuiteRunner])

class AnuragDAOTest  extends Specification with Logging with JUnit {

  "AnuragModel" should {

    "get elements by id" in new AnuragModelContextNoChange {

      AnuragTestDAO.findItemById("1").size must_== 1

    }

}

I get following error:

org.specs.runner.SpecError: com.novus.salat.util.GraterGlitch: 

      GRATER GLITCH - unable to find or instantiate a grater using supplied path name

      REASON: Class com.flipkart.sindbad.data.model.CollectionFoo is not an instance of CaseClass

      Context: 'CustomSalatContext'

      Path from pickled Scala sig: 'com.flipkart.sindbad.data.model.CollectionFoo'

The same thing works perfectly fine if i make class CollectionFoo a case class. 

How can i make SalatDAO work for non case classes?

Thanks!

[rose katherine toomey]

Hi Anurag,

Salat supports case classes and abstract classes/traits whose concrete implementation is a case class.

Please look at the section titled "What doesn't Salat support?" in the README -

https://github.com/novus/salat

Thanks,

Rose

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