queryset对象上的Django order by

Question

我有以下管理操作，将数据导出到CSV文件，我正在努力找出如何在queryset参数上排序：

import csv
from django.core.exceptions import PermissionDenied
from django.http import HttpResponse

def export_as_csv(modeladmin, request, queryset):
    """
    Generic csv export admin action.
    """
    if not request.user.is_staff:
        raise PermissionDenied
    opts = modeladmin.model._meta
    response = HttpResponse(mimetype='text/csv')
    response['Content-Disposition'] = 'attachment; filename=%s.csv' % unicode(opts).replace('.', '_')
    writer = csv.writer(response)
    field_names = [field.name for field in opts.fields]
    # Write a first row with header information
    writer.writerow(field_names)
    # Write data rows
    for obj in queryset:
        writer.writerow([getattr(obj, field) for field in field_names])
    return response
export_as_csv.short_description = "Export selected objects as csv file"

我以为下面的方法会奏效：

查询=queryset.objects.order_依据（“练习”）

但是我得到了以下错误：

^{pr2}$

Answer 1

我想你想

queryset = queryset.order_by('practice')

（否objects）