BigDecimal deserialization problem

[Filipe Lenfers]

Hi!

I need some help with BigDecimal deserialization.

I tried the instructions from here: http://www.scalatra.org/2.2/guides/formats/json.html and added this to my code:

  protected implicit val jsonFormats: Formats = DefaultFormats.withBigDecimal

I done this example code:

case class Test(value: BigDecimal) 
class BigDecimalTest extends MyAppStack with NativeJsonSupport {
  protected implicit val jsonFormats: Formats = DefaultFormats.withBigDecimal
  get("/") {
    Test(BigDecimal("1.23"))
  }
  post("/") {
    val o = parsedBody.extract[Test]
    println(o)
    o
  }
}

When I call the get method I receive:

{"value":1.23}

But when I try to send the same json to the post method I receive:

No usable value for value Do not know how to convert JDouble(1.23) into class scala.math.BigDecimal
org.json4s.package$MappingException: No usable value for value Do not know how to convert JDouble(1.23) into class scala.math.BigDecimal

I tried to use JacksonJsonSupport instead of NativeJsonSupport, but I runt into the same problem.

I'm using scalatra 2.2.2 and json4s 3.2.7.

Thanks for the help,

Filipe. 

[Ivan Porto Carrero]

That is a bug in json4s, it's missing those clauses in a pattern match. 3.2.9-SNAPSHOT has a fix for it I think

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[Filipe Lenfers]

Thanks!  I will try json4s 3.2.9-SNAPSHOT .

Regards, 

Filipe.

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Filipe Pais Lenfers