Got it. Thanks for the info. I was afraid I was doing something wrong.
Thanks,
Lincoln
On Sun, Sep 13, 2009 at 9:48 AM, Joni Freeman <freeman.j...@gmail.com>wrote:
>
> Hi,
>
> Your example should work if you take the val away from your case
> class:
>
> case class MyName(first:String, last:String)
> case class MyUser(id:String, name:MyName, url:String)
>
> The reflection code currently fails to find the primary constructor of
> case class if there's extra fields. This will hopefully be fixed some
> day when the reflection story of Scala gets better (using Java
> reflection is very awkward).
>
> Cheers Joni
>
> On Sep 13, 7:55 am, Lincoln <linxbet...@gmail.com> wrote:
> > Sorry, here's the full code I'm using:
> >
> > case class MyName(first:String, last:String)
> > case class MyUser(id:String, name:MyName, url:String) {
> > val wtf = "wtf"
> >
> > }
> >
> > implicit val formats = net.liftweb.json.DefaultFormats
> > val json =
> > ("id" -> me.id) ~
> > ("name" ->
> > ("first" -> me.name.first) ~
> > ("last" -> me.name.last)
> > ) ~
> > ("url" -> me.url)
> > val output = JsonDSL.pretty(render(json))
> > val jsonCopy = parse(output)
> > val user = jsonCopy.extract[MyUser]
> > println("user = "+user)
> >
> > On Sun, Sep 13, 2009 at 12:07 AM, linxbetter <linxbet...@gmail.com>
> wrote:
> > > Hello, I saw a post about lift-json on the scala-user list so I
> > > decided to check it out. I was particularly interested in the ability
> > > to call something along the lines of json.extract[MyClass]. I set up
> > > a little test case for this though, and apparently having a val of any
> > > sort in my case class causes the below exception. Any thoughts?
> >
> > > My classes looked like this:
> > > case class MyName(first:String, last:String)
> > > case class MyUser(id:String, name:MyName, url:String) {
> > > val wtf = "wtf"
> > > }
> >
> > > And the output of my test
> >
> > > [info] lift-json should
> > > [info] x do pain-free json conversion on nested objects
> > > net.liftweb.json.MappingException: Expected JField but got JNothing,
> > > json='JField(name,JObject(List(JField(first,JString(Lincoln)), JField
> > > (last,JString(Hochberg)))))', path='wtf'
> > > at net.liftweb.json.Extraction$.net$liftweb$json$Extraction$
> > > $fail(Extraction.scala:151)
> > > at net.liftweb.json.Extraction$.fieldValue$1(Extraction.scala:
> > > 106)
> > > at net.liftweb.json.Extraction$.build$1(Extraction.scala:78)
> > > at net.liftweb.json.Extraction$$anonfun$1.apply
> > > (Extraction.scala:84)
> > > at net.liftweb.json.Extraction$$anonfun$1.apply
> > > (Extraction.scala:84)
> > > at scala.List.flatMap(List.scala:1132)
> > > at net.liftweb.json.Extraction$.build$1(Extraction.scala:84)
> > > at net.liftweb.json.Extraction$$anonfun$1.apply
> > > (Extraction.scala:84)
> > > at net.liftweb.json.Extraction$$anonfun$1.apply
> > > (Extraction.scala:84)
> > > at scala.List.flatMap(List.scala:1132)
> > > at net.liftweb.json.Extraction$.build$1(Extraction.scala:84)
> > > at net.liftweb.json.Extraction$.extract0(Extraction.scala:109)
> > > at net.liftweb.json.Extraction$.extract(Extraction.scala:60)
> > > at net.liftweb.json.JsonAST$JValue.extract(Json.scala:109)
> > > at com.hotpotato.core.SerializationSpec$$anonfun$1$$anonfun
> > > $apply$1.apply(SerializationSpec.scala:87)
> > > at com.hotpotato.core.SerializationSpec$$anonfun$1$$anonfun
> > > $apply$1.apply(SerializationSpec.scala:69)
> > > at org.specs.specification.ExampleExecution$$anonfun$3$$anonfun
> > > $apply$1.apply(Example.scala:207)
> > > at org.specs.specification.Example.execute(Example.scala:121)
> > > at org.specs.specification.ExampleLifeCycle$class.executeTest
> > > (ExampleLifeCycle.scala:20)
> > > at org.specs.Specification.executeTest(Specification.scala:28)
> > > at org.specs.specification.Sus.executeTest(Sus.scala:147)
> > > at org.specs.specification.ExampleExecution$$anonfun$3.apply
> > > (Example.scala:207)
> > > at org.specs.specification.ExampleExecution$$anonfun$3.apply
> > > (Example.scala:194)
> > > at org.specs.specification.ExampleExecution$$anonfun$2.apply
> > > (Example.scala:185)
> > > at org.specs.specification.ExampleExecution.execute
> > > (Example.scala:227)
> > > at org.specs.specification.Example.execute(Example.scala:117)
> > > at org.specs.specification.Example.errors(Example.scala:143)
> > > at org.specs.specification.Sus$$anonfun$successes$1.apply
> > > (Sus.scala:122)
> > > at org.specs.specification.Sus$$anonfun$successes$1.apply
> > > (Sus.scala:122)
> > > at scala.List.filter(List.scala:859)
> > > at org.specs.specification.Sus.successes(Sus.scala:122)
> > > at org.specs.Specification$$anonfun$successes$1.apply
> > > (Specification.scala:84)
> > > at org.specs.Specification$$anonfun$successes$1.apply
> > > (Specification.scala:84)
> > > at scala.List.flatMap(List.scala:1132)
> > > at org.specs.Specification.successes(Specification.scala:84)
> > > at sbt.impl.SpecsRunner.sbt$impl$SpecsRunner$
> > > $reportSpecification(TestFrameworkImpl.scala:140)
> > > at sbt.impl.SpecsRunner.runTest(TestFrameworkImpl.scala:123)
> > > at sbt.BasicTestRunner.run(TestFramework.scala:38)
> > > at sbt.TestFramework$$anonfun$7$$anonfun$apply$8.runTest$1
> > > (TestFramework.scala:136)
> > > at sbt.TestFramework$$anonfun$7$$anonfun$apply$8$$anonfun$apply
> > > $9.apply(TestFramework.scala:147)
> > > at sbt.TestFramework$$anonfun$7$$anonfun$apply$8$$anonfun$apply
> > > $9.apply(TestFramework.scala:147)
> > > at sbt.NamedTestTask.run(TestFramework.scala:57)
> > > at sbt.ScalaProject$$anonfun$sbt$ScalaProject$$toTask$1.apply
> > > (ScalaProject.scala:167)
> > > at sbt.ScalaProject$$anonfun$sbt$ScalaProject$$toTask$1.apply
> > > (ScalaProject.scala:167)
> > > at sbt.TaskManager$Task.invoke(TaskManager.scala:62)
> > > at sbt.impl.RunTask.runTask(RunTask.scala:78)
> > > at sbt.impl.RunTask.sbt$impl$RunTask$$runIfNotRoot
> > > (RunTask.scala:63)
> > > at sbt.impl.RunTask$$anonfun$runTasksExceptRoot$3.apply
> > > (RunTask.scala:49)
> > > at sbt.impl.RunTask$$anonfun$runTasksExceptRoot$3.apply
> > > (RunTask.scala:49)
> > > at sbt.Distributor$Run$Worker$$anonfun$2.apply
> > > (ParallelRunner.scala:130)
> > > at sbt.Distributor$Run$Worker$$anonfun$2.apply
> > > (ParallelRunner.scala:130)
> > > at sbt.Control$.trapUnit(Control.scala:19)
> > > at sbt.Distributor$Run$Worker.run(ParallelRunner.scala:130)
> > > [error] net.liftweb.json.MappingException: Expected JField but got
> > > JNothing, json='JField(name,JObject(List(JField(first,JString
> > > (Lincoln)), JField(last,JString(Hochberg)))))', path='wtf'
> >
> >
> >
>
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