使用python3.8+django3.0.3+xadmin2.0.1，在adminx.py文件中设置list_export_fields控制excel导出字段无效

[awe1233]

list_display = ['device_id', 'device_name', 'device_place', 'device_count', 'created_time', 'owner', 'priority', 'department', 'process', 'repair_time', 'operator_acceptance', 'operator_report', ]

list_export = ('xls', 'csv', 'xml', 'json') list_export_fields = ('device_id',) 但是导出的excel是全部字段都导出

源代码如下： class Device_Repair_Admin(object):

def operator_acceptance(self, obj):
    return format_html(
        '<a href="{}">验收</a>',
        reverse('repair_app:repair_acceptance', args=(obj.device_id,))
    )

operator_acceptance.short_description = '验收'

def operator_report(self, obj):
    return format_html(
        '<a href="{}">上报</a>',
        reverse('repair_app:repair_report', args=(obj.device_id,))
    )

operator_report.short_description = '上报'

def operator_repair(self, obj):
    return format_html(
        '<a href="{}">进行维修</a>',
        reverse('repair_app:repair_approve', args=(obj.device_id,))
    )

operator_repair.short_description = '操作'

list_display = ['device_id', 'device_name', 'device_place', 'device_count', 'created_time', 'owner', 'priority',
                'department', 'process', 'repair_time', 'operator_acceptance', 'operator_report',
                ]

list_export = ('xls', 'csv', 'xml', 'json')
pdb.set_trace()
list_export_fields = ('device_id',)

show_bookmarks = False

fields = ['device_id', 'device_name', 'device_place', 'device_count', 'priority',
                'department', 'process', 'repair_time', ]

list_filter = ['created_time', 'process', ]

def save_models(self):
    self.new_obj.owner = self.request.user
    return super(Device_Repair_Admin, self).save_models()