To add the 'Set field value from User Property value' post-function to a transition :
Click Edit for the workflow that has the transition you wish to configure the post-function on.
In the Workflow Designer, select the transition.
Click on Post Functions in the properties panel.
Click on Addpost function.
Select Set field value from User Property value from the list of post-functions.
Click on Add to add the post-function on the transition.
Input the user property name in the Source User Property name field.
Select the field name from the Destination Issue Field drop-down.
Click on Add to add the post-function to the transition.
When you add this post-function to a transition and trigger the transition, the add-on copies the value of the specified user property for the current user to the selected destination field. The user property is used to store extra information about a user. These properties come from the user details in the User management screen. They can be set on the Edit Properties screenof the user. For more information see Adding a property to a user.
You can customize the post-function using these options:
From user: Select the user whose user property should be set
Current user: The value of the specified user property of the current user will be set
User in field: The value of the specified user property of the user selected in the single-user picker field will be set
Set only if empty: Sets the value of the selected field only if the field is empty.
Create missing value(s): Allows automatically creating any missing value(s) while setting a field value from a user property. This is applicable only to Affects Version/s, Fix Version/s, Single version and Multi-version picker type custom fields, Components, Radio buttons, Checkboxes, Single select and Multi-select list type custom fields.
By default, all errors (Java Exceptions) raised by this post-function, including those raised by custom Groovy scripts, will be logged in the JIRA log file but will not be reported to the user and will not prevent the transition from completing.
However, when designing new workflows or troubleshooting them, it is more convenient to be notified immediately of any such error during the execution of the transition. On development and staging Jira instances, you can activate error reporting for all JMWE post-functions on the JMWE configuration page, and it is recommended to do so. But on production Jira instances, you might want to show errors only for the post-function(s) being worked on, in order to avoid disrupting other workflows. To make errors raised by the current post-function prevent the transition from completing and show the error in the browser, select Make transition fail when an error occurs in this post-function.