Django 对查询集对象排序

Question

我有一个管理操作，它可以把数据导出到一个CSV文件里，但我在处理查询参数的排序时遇到了问题。

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"

我原以为下面的代码可以正常工作：

queryset = queryset.objects.order_by('practice')

可是我遇到了以下错误：

'QuerySet' object has no attribute 'objects'

Answer 1

我觉得你想要的是

queryset = queryset.order_by('practice')

(没有 对象)