class MyModelAdmin(admin.ModelAdmin): def changelist_view(self, request, extra_context=None): if not request.GET.has_key('decommissioned__exact'): q = request.GET.copy() q['decommissioned__exact'] = 'N' request.GET = q request.meta['QUERY_STRING'] = request.GET.urlenpre() return super(MyModelAdmin,self).changelist_view(request, extra_context=extra_context)
