How to handle JsValue in Scala/Play

Question

I'm trying to learn Scala/Play so I created a sample api that uses WSRequest to connect to GitHub and returns some info based on the user's id. I can convert this response to JsValue by doing:

val response: JsValeu = result.json
Ok(json)

I am having trouble when trying to manipulate the JsValue, for example filter values based on some criteria, etc? Do I need to convert it to a JsObject? I've looked on the Play documentation but I can't figure out how to do this.

What is the approach when handling JsValue?

Thanks

Answer 1

JsValue signifies any sort of JSON data entity, including objects, numbers, strings, etc.

If you want to filter values in a JsObject, then you'll have to "cast" your JsValue into a JsObject. like:

val jsonObject: JsObject = response.as[JsObject]

Then you can mutate the object how you like.

Read the documentation on JsObject and JsValue to find out how to do the rest of what you're trying to do.

• https://www.playframework.com/documentation/2.5.x/api/scala/index.html#play.api.libs.json.JsObject

• https://www.playframework.com/documentation/2.5.x/api/scala/index.html#play.api.libs.json.JsValue