ng-readonly to write mode

Hello,
I am learning angularjs and trying to understand how would I design a certain functionality.  I have a ng-repeat that gives me a table of some data entries with 3-4 rows. I want users to be able to click on a link in one of those rows and that opens the whole request in read mode since on all of the input fields I have set the ng-readonly attribute.  There is an EDIT button on that new page and I would like to change all of the fields from ng-readonly to write now, so they can modify data.

How would I do that, can someone please guide me?
Thanks