Relates to the spray-json Scala library.
spray-json is a lightweight, clean and simple json implementation in scala.
Questions tagged [spray-json]
327 questions
19
votes
2 answers
how to serialize case classes with traits with jsonspray
I understand that if I have:
case class Person(name: String)
I can use
object PersonJsonImplicits extends DefaultJsonProtocol {
implicit val impPerson = jsonFormat1(Person)
}
and thus serialize it with:
import…
Jas
- 12,534
- 20
- 79
- 134
18
votes
2 answers
Serialize Map[String, Any] with spray json
How do I serialize Map[String, Any] with spray-json? I try
val data = Map("name" -> "John", "age" -> 42)
import spray.json._
import DefaultJsonProtocol._
data.toJson
It says Cannot find JsonWriter or JsonFormat type class for…
Yaroslav
- 3,897
- 4
- 21
- 32
17
votes
6 answers
How to represent optional fields in spray-json?
I have an optional field on my requests:
case class SearchRequest(url: String, nextAt: Option[Date])
My protocol is:
object SearchRequestJsonProtocol extends DefaultJsonProtocol {
implicit val searchRequestFormat = jsonFormat(SearchRequest,…
François Beausoleil
- 15,505
- 11
- 62
- 86
12
votes
1 answer
Cannot find an implicit ExecutionContext. You might pass spray scala
I have this two erros:
Error:(39, 20) Cannot find an implicit ExecutionContext. You might pass
an (implicit ec: ExecutionContext) parameter to your method
or import scala.concurrent.ExecutionContext.Implicits.global.
val pipeline = sendReceive
…
kam kimo
- 173
- 1
- 2
- 7
12
votes
7 answers
Get JSON object from AJAX call
I'm new to AJAX and javascript. In my project, I have to get a json object in my javascript file. I've used spray-json and it shows me the json object in the url. http://localhost:8081/all-modules
{
"status": "S1000",
"description": "Success",
…
Shashika
- 1,454
- 6
- 25
- 41
11
votes
1 answer
Explanation for - No Reflection involved
I have a very simple question. This is not only true with spray-json but I have read similar claims with argonaut and circe. So please enlighten me.
In spray-json, I have come across the statement saying There is no reflection involved. I understand…
Jatin
- 28,098
- 11
- 88
- 150
11
votes
1 answer
How to expose REST service for JSON?
I need to expose a Spray service that accepts JSON payload. Where can I find a sample that would demonstrate such a feature?
Giri
- 240
- 3
- 12
10
votes
3 answers
Spray-json deserializing nested object
How to deserialize nested objects correctly in spray-json?
import spray.json._
case class Person(name: String)
case class Color(n: String, r: Int, g: Int, b: Int, p: Person)
object MyJsonProtocol extends DefaultJsonProtocol {
…
user3103600
- 173
- 1
- 2
- 5
10
votes
3 answers
spray-json and list marshalling
I'm using spray-json to marshal lists of custom objects into JSON. I have the following case class and its JsonProtocol.
case class ElementResponse(name: String, symbol: String, code: String, pkwiu: String, remarks: String, priceNetto: BigDecimal,…
Marcin Cylke
- 2,022
- 2
- 21
- 38
9
votes
1 answer
spray-json cannot marshal Map[String,String]
I have the following route setup, but when my map is returned in the first complete block I get an error:
could not find implicit value for evidence parameter of type…
ThaDon
- 7,212
- 9
- 45
- 77
9
votes
1 answer
Convert polymorphic case classes to json and back
I am trying to use spray-json in scala to recognize the choice between Ec2Provider and OpenstackProvider when converting to Json and back.
I would like to be able to give choices in "Provider", and if those choices don't fit the ones available then…
wernerb
- 105
- 1
- 5
8
votes
2 answers
Scala, spray-json: universal enumeration json formatting
I have such model: two enumerations and one case class with two fields of these enums types:
// see later, why objects are implicit
implicit object Fruits extends Enumeration {
val Apple = Value("apple")
val Orange = Value("orange")
}
implicit…
Evgeny Veretennikov
- 3,029
- 2
- 11
- 35
8
votes
1 answer
How does Scala use explicit types when resolving implicits?
I have the following code which uses spray-json to deserialise some JSON into a case class, via the parseJson method.
Depending on where the implicit JsonFormat[MyCaseClass] is defined (in-line or imported from companion object), and whether there…
MrProper
- 953
- 6
- 14
8
votes
2 answers
Spray-Json: How to parse a Json Array?
I'm new to the Spray-Json API and I'm trying to parse a Json response from the Docker REST API.
There is a clean example of the usage of Spray-Json to parse this Google Map Json response :
{
"results" : [
{
"elevation" :…
abronan
- 3,003
- 4
- 26
- 37
7
votes
2 answers
spray-json failing for Seq of Eithers
Not sure this is a bug, but the following demo fails on the final cases:
import spray.json._
import DefaultJsonProtocol._
object SprayTest {
1.toJson
"".toJson
(Left(1): Either[Int, String]).toJson
(Right(""): Either[Int, String]).toJson
…
acjay
- 28,690
- 4
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- 93