validation - How to Validate Negative BigDecimals in scala play Framework FORMS? -


i want validate (do not allow) negative amount values , in post request following validation trait have form mapping,

bigdecimal has precision , scale, how make sure of negative bigdecimals coming in request?

  trait bicvalidation extends commonvaldidation {       implicit val bicform = form(         mapping(           "id" -> optional(number),           "name" -> text,           "description" -> optional(text),           "bid" -> optional(number),           "amount" -> bigdecimal         )(bic.apply)(bic.unapply)       )     }

try

"amount" -> bigdecimal.verifying("amount must negative", => < 0)

and see docs.


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