copy custom field value to summary

[Alex Piwowar]

we are using jira cloud. Im looking to find a way to copy the value of a custom field and make it the summary of the issue? This can either be done at the time the issue is created or as a post function. I was looking how to do this with scriptrunner but im pretty new to it.

[Vishnukumar Vasudevan]

We had similar discussions on below questions: 

Please refer, 

1. https://community.atlassian.com/t5/Answers-Developer-Questions/How-to-copy-values-from-two-fields-into-summary-by-script/qaq-p/496182

2. https://community.atlassian.com/t5/Jira-questions/Copy-custom-field-values-into-summary-field/qaq-p/261577