How to convert casbah mongodb list to json in scala / play

Question

I\'m learning scala and mongodb at present and using the play! framework, so I\'m making all sorts of mistakes as I get my head around things. Currently I have a scala objec

Answer 1

I have the following

def service() = Action {
 // connect
 val collection = MongoConnection()("someDB")("someCollection")
 // simply convert the result to a string, separating items with a comma
 // this string goes inside an "array", and it's ready to hit the road
 val json = "[%s]".format(
  collection.find(someQuery).toList.mkString(",")
 )

 Ok(json).as("application/json")

}

Answer 2

You can try

com.mongodb.util.JSON.serialize(Alerts.list())

This should return a JSON array with your Alerts

Answer 3

I have what is a horrid solution as follows;

val currentAlerts = Alerts.list()

var jsonList : List[JsValue] = Nil

// Iterate over the DBObjects and use to String to convert each to JSON
// and then parse that back into the list so we can use toJson on it later.
// MAD, but works.

for (dbObject <- currentAlerts) {
    jsonList ::=  Json.parse(dbObject.toString)
}

val result = Json.toJson(jsonList)
Ok(result).as("application/json")

There must surely be a better way?