how to access custom field in Jira Automation Rules

[Priyank]

I'm using the new Jira - Project Automation funcnality to create a rule to send automated emails, when a particular field - "Release Approval" - is changed to a value - "Requested"

this is working as expected. 

but in the email body, i want to include text from a Custom field "Request Justification" - which I"m not able to access - 

what will be the syntax ? {{issue.customfield_16747}} ? 

[Priyank · Accepted solution]

sorry this worked out, there was a typo. Can close this. 

[Peter N]

You should use {{issue.Request Justification.displayName}}

[Deleted user]

So the answer is, there is no answer.....This doesn't answer the underlying question that if one has created a Custom Field there is no clear way to access it.

[Priyank]

for jira fields - issue.key - works. 

similarly knowing the custom field value - and this syntax  "issue.customfield_16747" worked. 

so that's probably the case ?