CODEWITHSUNDEEP
jsonscalaplayframework
Fede E.
Fede E.

Reputation: 1918

Play Json - custom JsResultException

I'm trying to parse a json with Play Json, using as to parse single "fields". Like this:

val data = (json \ "dataField").as[String]

This throws a JsResultException if unable to parse the field or invalid. However, as I need to output the error in a "freindlier" way, I need to set a custom JsResultException message.

Is there a way of achieving this? I could do something like:

(json \ "dataField").asOpt[String].getOrElse(throw new Exception("Error parsing dataField field.")) and then matching Some(data: String)... None... but it seems too much code for each field I need to parse.

Upvotes: 1

Views: 142

Answers (1)

pme
pme

Reputation: 14803

When you use validate you get a list of errors. 

json.validate[MyClass] match {
  case JsSuccess(myClass, _) =>
    // do something
  case JsError(errors) =>
    // do something with the errors
}

The errors are of type Seq[(JsPath, Seq[JsonValidationError])]. You can transform this to whatever you want.

Upvotes: 1

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