Automation Rule/JSON not updating one custom field user with another.

Question

I have 2 custom fields, 10030 is multi user picker, and 10185 is a single user picker. I want to make an automation rule that ADDS user selected in 10185 to 10030. I need to accomplish this using JSON. This is how I have the automation rule currently:

{
"update": {
"customfield_10030" : [
{"add": {{issue.customfield_10185}}}
]
}
}

This returns error: Error while parsing additional fields. Not valid JSON.

Does anyone know how I can successfully use JSON to ADD a single user from customfield_10185 to customfield_10030? Thank you for your time!

Tomasz Kowalczyk_aly1rm · Answer

from documentation i found this part for setting multiuserpicker

{ "fields": { "Multi User Customfield": {{issue.parent.Multi User Customfield.accountId.asJsonObjectArray("id")}} } }

Tomasz Kowalczyk_aly1rm · Answer

So maybe try too pass something like this :
"add": [ {{issue.customfield_10185}}] i'm not sure is it properly configured json but for now i don't have place to test it.

Tyler Giles_1ssiu0 · Answer

@Tomasz Kowalczyk Thank you for your reply! So setting the smart value works, but it REPLACES what is already in customfield_10030, while what I am trying to do is ADD 10185 to what is already present in 10030.