Moreover, if I make the fields non-nullable like t...

# getting-started

[ptheocharis]

Moreover, if I make the fields non-nullable like this:

data class GreetingDto(
  val greeting: String,
  val name: String
)

then I get another error:
groovy.lang.GroovyRuntimeException: Could not find matching constructor for: app.greeting.GreetingDto(LinkedHashMap)

[jbnizet]

Not a Groovy expert, but I think you’re trying to pass a map as argument (which is Groovy’s approximation for named parameters). My guess is that just passing positional parameters should work: return new GreetingDto("Hello", "World")

[tddmonkey]

^^ This is 100% correct

[ptheocharis]

Thank you guys, it works