How to get multi valued field values in painless

Elastic Stack Elasticsearch
1

Hi,

I'm new to Elastic Search and Painless. I have a field in my index which has multiple values as shown below.

FieldName Language
Value "Computer Science"

In painless, When i try to get the value of this field as doc['Language'] - It returns value as ["Computer", "Science"] which is an array.

Is there a option where i can get the value as string than Array?

Thanks for the help!

2

This will depend on how the mapping of the field is setup. If you don't want the value to be tokenized, set the field type to keyword. However, doc['Language'] will always return a List. You can either just access the first value using [0], or use .value.