Prepopulate initial values for fields in the Django Admin without slugifying
There is no out of the box support for this (assuming you're talking replacing the exact, live editing that preopulated_fields provides).
The slug function is written in JavaScript, in django/contrib/admin/media/js/urlify.js
You could potentially insert a new script in the ModelAdmin extra JS property, but make sure your admin page doesn't actually need the "real" slugify script :)
In the Django admin, I can set a slug field to fill in automatically using prepopulated_fields.  How can I set a field to fill in using a different function, for example just basic concatenation instead of lowercase and spaces-to-hyphens ?