How to convert JSON String to a BSONDocument

Question

I have the following function that uses the reactivemongo driver and actually does a good job writing to the database.

def writeDocument() = {
    val docume         


        

Answer 1

The ReactiveMongo release note notes:

When using the support for Play JSON, if the previous error occurs, it necessary to make sure import reactivemongo.play.json._ is used, to import default BSON/JSON conversions.

Answer 2

First, you could serialize your model classes as BSON using reactivemongo. Check docs to see how.

If you want to make a BSONDocument from String through play json you can use

val playJson: JsValue = Json.parse(jsonString)
val bson: BSONDocument = play.modules.reactivemongo.json.BSONFormats.reads(playJson).get

Edit

I found more in the docs here:

http://reactivemongo.org/releases/0.11/documentation/tutorial/play2.html

you can import those two

import reactivemongo.play.json._
import play.modules.reactivemongo.json.collection._

Instead of using the default Collection implementation (which interacts with BSON structures + BSONReader/BSONWriter), we use a specialized implementation that works with JsObject + Reads/Writes.

So you create specialized collection like this (must be def, not val):

def collection: JSONCollection = db.collection[JSONCollection]("persons")

and from now on you can use it with play json, instead of BSON, so simply passing in Json.parse(jsonString) as a document to insert should work. You can see more examples in the link.

Edit 2 I got your code to compile:

package controllers

import play.api.libs.concurrent.Execution.Implicits._
import play.api.libs.json._
import play.modules.reactivemongo.json.collection.{JSONCollection, _}
import reactivemongo.api.MongoDriver
import reactivemongo.play.json._
import play.api.libs.json.Reads._

import scala.util.{Failure, Success}


object Mongo {

  def collection: JSONCollection = {
    val driver = new MongoDriver
    val connection = driver.connection(List("localhost"))
    val db = connection("superman")
    db.collection[JSONCollection]("IncomingRequests")
  }

  def writeDocument() = {

   val jsonString = """{
                       | "guid": "alkshdlkasjd-ioqweuoiquew-123132",
                       | "title": "Hello-2016",
                       | "year": 2016,
                       | "action": "POST",
                       | "start": "2016-12-20",
                       | "stop": "2016-12-30"}"""


    val document = Json.parse(jsonString).as[JsObject]
    val future = collection.insert(document)
    future.onComplete {
      case Failure(e) => throw e
      case Success(result) =>
        println("successfully inserted document with result = " + result)
    }
  }
}

the important import is

import play.api.libs.json.Reads._

and you need JsObject, not just any JsValue

val document = Json.parse(jsonString).as[JsObject]