how to send email to users in custom-user-field

[Pravin]

Product details:

• Jira v7.7.1
• Test Management for Jira (Adaptavist) v4.6.2

Requirement:

Within the add-on "Test Management for Jira (Adaptavist) v4.6.2" I have a custom field User". This is list of users having access to "Test Management for Jira (Adaptavist) v4.6.2". These is not Jira field but custom add-on fields. I want to send a email to username as set in field "User" 

For e.g. 

if I set abc as user in the "User" field, a email should go to abc mentioning that he is mentioned in a "Test case'. The email should also contain link to this "Test Case".

How to do this?

I am not a programmer, but ready to learn whatever the solution asks for.

[Mesut Yilmazyildirim]

I believe you can do this with Script-Runner add-on (under built-in scripts) (Not tested)

1. Edit your existing workflow
2. Choose Add PostFunction
3. Choose Script Post Function
4. Choose Send a custom email
5. Add "User" in the note field
6. Find out the customfield_id of your User field (this link shows you how to find your customfield id)
7. Put this value into the "To issue fields" textbox
8. Choose the Add button and publish the new workflow.

[Pravin]

#6: Since this is a custom field from add-on "test management for jira", how to gets is custom_id? (Attaching a screenshot)

[Mesut Yilmazyildirim]

1. go to Administration/Custom Fields
2. click on the "Configure" link for the custom field you're interested in
3. in the URL of the Configure Custom Field page, note the number after "customFieldId=" and append it to "customfield_" to build the custom field ID