Question

I am trying to access a nested field using gstring but it throws exception groovy.lang.MissingPropertyException

I have two classes

Class Person{
   Address address
}
Class Address{
  String city
}

Somewhere in my code I am doing,

def person = Person.get(1)
def field = "address.city"
def city = person."${field}"

The line where I am trying to fetch city from person is throwing groovy.lang.MissingPropertyException

If I try to fetch a direct property using gstring it works but the above given code doesnt work.

Any help?

Answer 1

What you’re doing here is trying to access a property by name address.city which is equal to person."address.city", which means that the dot here gets considered as part of property name – not as access separator as you expect. The following code should resolve your property:

def city = field.tokenize('.').inject(person) {v, k -> v."$k"}