How to determine a field type using painless

Elastic Stack Elasticsearch
1

Hey,

I am running Elasticsearch 5.6.8.

In my script in an UPDATE, I assume a field being a HasMap, but I got an error like:

Caused by: java.lang.IllegalArgumentException: Unable to find dynamic method [containsKey] with [1] arguments for class [java.util.ArrayList].

Is it possible to determine the type of a ctx._source.* field with painless, so I can react accordingly?

Thanks in advance,
Daniel

2

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