How to change one field value based on updated value of another field?

[Prasanna]

I want to make one field read-only and change its value based on updated value of another field? How to achive this?

[John Funk]

Hi @Prasanna  - We use Automation For Jira to do that. 

[Prasanna]

Dear @John Funk 

Thanks for your reply.

What do you mean by Automation For Jira? How do you achieve it? Do you use any add-on for that?

[John Funk]

Automation For Jira is an add-on for Jira. You can find it here:

https://marketplace.atlassian.com/apps/1215460/automation-for-jira?hosting=cloud&tab=overview

[Mohamed Benziane]

Hello @Prasanna 

You will need add on like scriptrunner or other to achieve this.

Hope this helps

[Prasanna]

Hi @Mohamed Benziane 

Thanks for your reply.

I want to achieve this without any third party add-on. I read about events and listener class, do you think it can be achievable using events and listener in a plugin.

[Mohamed Benziane]

Yes i think that you can write you own plugin to achieve this. The link below should be a good start :

https://docs.atlassian.com/software/jira/docs/api/7.2.0/overview-summary.html

Hope this helps