playframework - play anorm, create a model from json without passing anorm PK value in the json -

object users  {    implicit object userreads extends reads[user] {     def reads(json: jsvalue) = jssuccess(user(       id((json \ "id").as[string].tolong),       (json \ "name").as[string],       (json \ "email").as[string]   }   implicit object userwrites extends writes[user] {     def writes(user: user) = jsobject(seq(       "id" -> jsnumber(user.id.get),       "name" -> jsstring(user.name),       "email" -> json.tojson(user.email)   }    def view(id: long) = action { implicit request =>     ok(json.tojson(user.find(id)))   }    def all() = action { implicit request =>     ok(json.tojson(user.findall()))   }    def save = action(parse.json) { request =>     val userjson = request.body     val user = userjson.as[user]     try {       user.create(user)       ok("saved")     } catch {       case e: illegalargumentexception => badrequest("error")     }   } }   case class user(   id: pk[long] = notassigned,   name: string = "",   email: string = "") 

the above 2 controller & model, when send user data [id, name, email] json using angular js, creates user object in database. should able create when input [name, email] or [name] email null. if i'm not wrong should adjust these in reads , writes method of user, it?.

also, can have 2 reads/writes different pursposes, if how can achieved - throw light. thanks.

one issue fixed following:

case class user(   id: pk[long] = notassigned,   name: string = "",   email: option[string])  implicit object userreads extends reads[user] {     def reads(json: jsvalue) = jssuccess(user(       id((json \ "id").as[string].tolong),       (json \ "name").as[string],       (json \ "email").asopt[string])   }   implicit object userwrites extends writes[user] {     def writes(user: user) = jsobject(seq(       "id" -> jsnumber(user.id.get),       "name" -> jsstring(user.name),       "email" -> json.tojson(user.email))   } 

now email can null, id - pk[long]

i did not compile this, should work:

case class user(   id: pk[long] = notassigned,   name: string = "",   email: option[string])  implicit object userreads extends reads[user] {     def reads(json: jsvalue) = jssuccess(user(       (json \ "id").asopt[long].map(id => id[long](id)).getorelse(notassigned)       (json \ "name").as[string],       (json \ "email").asopt[string])   }   implicit object userwrites extends writes[user] {     def writes(user: user) = jsobject(seq(       "id" -> jsnumber(user.id.get),       "name" -> jsstring(user.name),       "email" -> json.tojson(user.email))   } 

basically take id option[long] did email. check if set , if yes create pk instance id[long](id) , if not provide notassigned pk singleton instance.

additional tip

alternatively can try use

implicit val jsonformatter = json.format[user] 

it create reads , writes directly @ compile time. there 2 problem if using anorm object directly:

first need format pk[long]

implicit object pklongformat extends format[pk[long]] {   def reads(json: jsvalue): jsresult[pk[long]] = {     json.asopt[long].map {       id => jssuccess(id[long](id))     }.getorelse(jssuccess(notassigned))   }   def writes(id: pk[long]): jsnumber = jsnumber(id.get) } 

second not work, if not send id @ all, not value null, client needs send {"id": null, "name": "tim"} because not try call pkformatter handle jsundefined, gives "validate.error.missing-path" error

if don't want send null ids cannot use macro json.format[user]