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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