Watchers Actions Send Field Value

Elastic Stack Kibana
1

How can I send a field value in the watchers' actions (pager duty notifications)?

For example:

This one works and return number of total hits:
"description":"Total Hits # {{ctx.payload.hits.total}}"

But I want to get the field value of the top hit:
something like this, but it doesn't work (instead {{ctx.payload.hits.hits.get(0)._source.fieldname}} just returns empty value):
"description":"Top Hit Field {{ctx.payload.hits.hits.get(0)._source.fieldname}}"

2

It's supposed to be something like this:

ctx.payload.hits.hits.<index>.fields.<fieldname>

Where index is a numeric value (would be 0 in you case) and the fieldname has to actually be the name of the field that you want to get the top hit from.