Thinking ahead to what will happen when we finish our first iteration in Mingle, I'm wondering how to handle hangover, partially completed stories. Stories that we didn't get to at all are easy, just use tree view to drag the story with tasks to the next iteration.
But how do you handle partial ones? Moving the story over would screw up reporting for the previous iteration, unless you take the completed tasks and make them direct children of the previous iteration. But doing that loses the context of the task, as in which story was it for.
My best guess at this point is to create a placeholder story card for the previous iteration, which refers to the real story card, and immediately 'close' it. Then move the completed tasks to the placeholder, and move the real story card with all unfinished tasks over to the next iteration. My main problem with this is it seems a bit odd to have to create dummy story cards, that will come up in filters, searches, etc etc.
Is there some other approach that people are using that avoids that problem?