Setting values on issue when changing status

[PEtter Ekrann]

When dragging the Issue into the "under development" state I want to set the Assigned To field to the user moving the issue.. 

Probably an easy thing, but can't find it. 

I would also like to update a custom field to the current date, this date should not change even if the item is set to the same status again.. 

[PEtter Ekrann · Accepted solution]

The one that search will find :D 

This was under rules on the board ... 

Except the fact that the custom filed will update every time i drag it to given col-.