Set field on transition only if field is empty

[Jeanne Howe]

We are trying to capture certain transition dates for SLA purposes. I know I can set a custom date field as a post function to a transition. The problem is, if the issues moves back through the same transition more than once, the date field is updated each time, over writing the original value. I only want to capture the first time it transitioned. How do I set up a past function that will set the custom date field ONLY if the field is empty

[Randall Robertson · Accepted solution]

You can set up a conditional post function. Conditional Post Functions are possible with the Workflow Enhancer plugin. Also see its documentation.

[Joe Pitt]

A simple way is to create 2 transitions;

1. checks and if the field is empty it will be available and sets the date in a post function

2. checks and if field is not empty it will be available and doesn't touch the date.

[Mrudula.Madugu]

How to doesn't touch the date using default Jira post function?

[Dmitriy Pelevin]

One transition have post function, another not.

What transition to use checked by field value.