How do i find system field value/ID for Original Estimation

[Defny]

Could you please help me find the field ID for system and custom field through application.

[Jacob Wood]

Custom field > Configure > Look in the url

[Peddinti Hemanth Satyakumar]

I guess this is for Manually added Custom Fields, how to check Id for default system fields?

[Jacob Wood]

Custom fields have numerical id's whereas the system default fields all have names (tends to be a 1:1 ie assignee = assignee).

This link lists them;

https://docs.atlassian.com/software/jira/docs/api/7.6.1/constant-values.html?_ga=2.145199223.2114534511.1548064895-710919896.1546595842#com.atlassian.jira.issue.IssueFieldConstants.AFFECTED_VERSIONS

[Peddinti Hemanth Satyakumar]

Thanks for the reply, what I'm trying is when I create an issue I have the two fields due date(system field) and priority(select list drop-down), I need to auto-populate the due date field to today's date when I select any of the select list in the priority field. do you have any idea on this to help?

[Jacob Wood]

This isn't possible with a standard Jira setup. You can only change fields with post functions and not based off the value of another field. I don't know if any add-ons such as script runner would be able to do this