Hi,
During my journey through the lift source code & examples I was
wondering the following:
you have a simple mapped class User
class Person extends LongKeyedMapper[Person] with IdPK {
def getSingleton = Person
object firstName extends MappedString(this, 100)
object lastName extends MappedString(this, 100)
I was wondering why firstName and lastName was an object. I also tried
changing it to a val (just wondering what the result would be)
so:
val firstName = new MappedString(this,100)
This compiled without a problem, however at runtime, this would throw
an exception.
Exception occured while processing /database
Message: java.lang.NullPointerException
net.liftweb.mapper.MappedField$class.dbColumnName(MappedField.scala:
516)
net.liftweb.mapper.MappedString.dbColumnName(MappedString.scala:38)
net.liftweb.mapper.MetaMapper$$anonfun$_addOrdering$1.apply
(MetaMapper.scala:455)
net.liftweb.mapper.MetaMapper$$anonfun$_addOrdering$1.apply
(MetaMapper.scala:454)
scala.List.flatMap(List.scala:1132)
net.liftweb.mapper.MetaMapper$class._addOrdering(MetaMapper.scala:
454)
net.liftweb.mapper.MetaMapper$class.addEndStuffs(MetaMapper.scala:
465)
net.liftweb.example.model.Person$.addEndStuffs(Person.scala:22)
I have 2 questions:
1. why did the val firstName not work?
2. if this is prohibited, why is the MappedString class not abstract
or a trait?
Best regards,
Jo
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