I have following Scala console session for json4s, where I am trying to extract String value from a parsed json: scala> import org.json4s._ import org.json4s._ scala> import org.json4s.nativ...

How can I map a json with underscore to a camelCase field in a case class? import org.json4s.jackson.JsonMethods.parse import org.json4s.DefaultFormats object Testing { implicit val formats = De...

I've run into an issue with attempting to parse json in my spark job. I'm using spark 1.1.0, json4s, and the Cassandra Spark Connector, with DSE 4.6. The exception thrown is: org.json4s.package$Ma...

In my Scala Spray.io application, I would like to turn some Joda LocalTime and LocalDate objects into JSON. This is apparently done by adding JodaTime support from Json4s to the DefaultFormats as f...

In json4s examples and documentation I often see the idioms compact(render(jval)) and pretty(render(jval)) I do not think I have actually seen an example with compact or pretty applied direct...

I have this JSON that is returned from a REST-service I'm using. { "id": "6804", "signatories": [ { "id": "12125", "fields": [ { "type": "standard", "name": "fstname", "value": "John" },...

I'm learning Json4s library. I have a json fragment like this: { "records":[ { "name":"John Derp", "address":"Jem Street 21" }, { "name":"Scala Jo", "address":"in my sweet dream" } ] } ...

Even after reading: Scala, problem with a jar file, I'm still a bit confused. I am trying to import some packages into my Scala file, and the interpreter is not recognizing them even after adding t...

I am using json4s to work with JSON objects in my Scala code. I want to convert JSON data to an internal representation. The following learning test illustrates my problem: "Polimorphic deseraili...

I am currently trying to extract the information from a json array using json4s (scala). An example data is as follows: val json = """ [ {"name": "Foo", "emails": ["[email protected]", "[e...

Is it possible to make json4s not to throw exception when required field is missing ? When I "extract" object from raw json string it throws exception like this one org.json4s.package$MappingExce...

I am experimenting with the json4s library (based on lift-json). One of the things I would like to do is to parse a JSON string into an AST, and then manipulate it. For example, I would like to up...

I am using the facebook graph API and the responses look similar to this: { "data": [ { "id": "311620272349920_311718615673419", "from": { "id": "1456046457993048", "name": "Richard Ettins...

Let's assume I have a case class with the following setup: case class Place(id:java.util.UUID, name:String) I can write a (working!) serializer for this type as follows: class placeSerializer e...

Suppose I have an enumeration or sealed group of case objects as follows: sealed abstract class Status case object Complete extends Status case object Failed extends Status case object Pending...

I have some source object src and would like to get a JValue from it. All the examples and documentation for json4s seem to revolve around getting a JSON-encoded string, like so: def encodeJson(sr...

I am writing a Customer Serializer. In that Serializer I would like to somehow say: "and this thing you already know how to serialize". My current approach looks like that: import org.json4s.na...

I would like to support a couple of different content types submitted to the same URL: e.g: application/x-www-form-urlencoded, multipart/form-data, application/json I would like to do something...

I have a json with some fields and I want to check if some of them are present. I'm extracting the value and testing it against JNothing, but it is too verbose: val json: JValue = ... val jsonIsT...

How do you create Json object with values of different types ? I'm using spray-json Here is the code val images : List[JsObject] = fetchImageUrls(url).map((url: String) => { JsObject(List( ...