[Resolved]Script is invalid for doc['kf4'].value + '-' + doc['kf5'].value

[cheriemilk]

Hi Team,

In created a script field in kibana->Index Patter->Create script field with script is doc['kf4'].value + '-' + doc['kf5'].value

When I save the field, it tells me that 'Script is invalid.'
Please refer to below screenshot below:

Below is the data in elk for kf4 and kf5

Can you please advice what wrong with the syntax?

[Marius_Dragomir]

You should be using double quotes for the string, so it would be:
doc['kf4'].value + "-" + doc['kf5'].value

[cheriemilk]

Hi Marius,

double quotes doesn't work as well.
Finally, doc['kf4.keyword].value + "-" + doc['kf5.keyword'].value works.

Thanks,
Cherie