Set ref in form if user already has one

contest/views.py

@@ -148,7 +148,10 @@ def updateRef(request, shadow, uid):
 			messages.success(request, "%s%s ref set to %s" % ("(shadow) " if shadow else "", user, ref))
 			return HttpResponseRedirect(reverse("contest:registerRefs"))
 	else:
-		form = UpdateRefForm()
+		data = {}
+		if user.ref:
+			data["existingRef"] = user.ref
+		form = UpdateRefForm(initial=data)
 
 	return render(request, 'contest/updateRef.html', {'userobj': user, 'form': form, "shadow": shadow})