Export json admin action with inlines

gistfile1.py

def export_related_as_json(modeladmin, request, queryset):
    opts = modeladmin.model._meta
    for parent in queryset:
        for inline in modeladmin.inlines:
            related_params = inline.model.objects.filter(**{inline.fk_name: parent})
    from itertools import chain
    result_list = list(chain(queryset, related_params))
    data = serializers.serialize("json", result_list, indent=4)
    response = HttpResponse(data, mimetype="text/javascript")
    response['Content-Disposition'] = 'attachment; filename=%s.json' \
                                        % unicode(opts).replace('.', '_')
    return response
export_related_as_json.short_description = "Export selected with related parameters as JSON"