导出CSV文件功能！

    1. # 定义一个导出功能的函数
    2. def export_model_as_csv(modeladmin, request, queryset):
    3.     response = HttpResponse(content_type='test/csv',
    4.                             headers={'Content-Disposition': 'attachment; filename=test_%s.csv' % (
    5.     datetime.now().strftime('%Y-%m-%d-%H-%M-%S'),)
    6.                                      })
    7.     field_list = export_list
    8.     write = csv.writer(response)
    9.     write.writerow([
    10.         queryset.model._meta.get_field(f).verbose_name.title() for f in field_list
    11.     ])
    12.     for obj in queryset:
    13.         csv_line_values = []
    14.         for field in field_list:
    15.             field_object = queryset.model._meta.get_field(field)
    16.             field_value = field_object.value_from_object(obj)
    17.             csv_line_values.append(field_value)
    18.         write.writerow(csv_line_values)
    20.     return response
    22. # 定义按钮的名称
    23. export_model_as_csv.short_description = u'导出为csv文件'
    26. class CandidateAdmin(admin.ModelAdmin):
    27.     actions = [export_model_as_csv, ]

    附上文档地址：https://docs.djangoproject.com/zh-hans/3.2/howto/outputting-csv/