how to add post function transition to out going transitions,for auto updating start date

[yogi]

I have this simple workflow here, I added a post function for all transitions coming into done status to update the END date automatically.

similarly, I need to update the START date automatically for all the transitions that are going out from the backlog to any of the following statuses.

is there a way to add transitions for all outgoing transitions 'from the backlog', instead of 'to the backlog'?

This is for Jira cloud, using JMWE In the post functions

[Nic Brough -Adaptavist- · Accepted solution]

No, that cannot be done.  You will need to remove most of the "all" transitions and replace them with a set of (probably) shared transitions. 

A transition only has one end point, but can have many start points, so you need one transition from backlog to each other status, and one transition from all the other status to each other.

[jira guy]

Each to achieve if you have linear workflow instead of All. Like Backlog goes to Planning --> Implementation and so on.