小编ton*_*sta的帖子

我的型号：

class TreeNode(MPTTModel):
    ...
    @property
    def pay_progress(self):
        return "{}/{}".format(self.annuities.exclude(fact_date=None).aggregate(Sum('total'))['total__sum'] or 0,
                             self.annuities.aggregate(Sum('total'))['total__sum'])

资源：

from import_export import resources
from models import TreeNode


class TreeNodeResource(resources.ModelResource):
    class Meta:
        model = TreeNode

看法：

def export_treenode_csv(request):
    treenode_resource = TreeNodeResource()
    dataset = treenode_resource.export()
    response = HttpResponse(dataset.xls, content_type='application/vnd.ms-excel')
    response['Content-Disposition'] = 'attachment; filename="TreeNode.xls"'

    return response

但是此代码仅导出存储在数据库中的字段。如何将pay_progress属性值添加到导出的报告中？