Question

我正在使用Django 1.8.3和Python 3.4.3

我有一个模型，它返回一个对象列表到我的模板，其中包含＆＃39; for＆＃39;环;其中一张表是针对＆＃39; sales＆＃39;。我想创建一个标签，它是所有＆＃39;销售＆＃39;并使用标记将total_sales插入到我的模板中。前提是不必手动将所有列添加到一起以获得总数，只需在页面上有一个自动计算并显示总数的部分。

以下是我当前的型号/视图。任何帮助是极大的赞赏。谢谢。

model.py

class Traffic(models.Model):
    date = models.DateField()
    traffic = models.PositiveIntegerField(null=True)
    day_of_week = models.CharField(max_length=255, null=True)
    ifs_signups = models.IntegerField(null=True)
    campaigns = models.IntegerField(null=True)
    sales = models.PositiveIntegerField(null=True)

    def month(self):
        return self.date.strftime("%B")

    def quarter(self):
        item = self.date.strftime("%B")
        q1 = (["January", "February", "March"])
        q2 = (["April", "May", "June"])
        q3 = (["July", "August", "September"])
        q4 = (["October", "November", "December"])

        if item in q1:
            return "1st Quarter"
        elif item in q2:
            return "2nd Quarter"
        elif item in q3:
            return "3rd Quarter"
        elif item in q4:
            return "4th Quarter"
        else:
            return "No Date Specified"

    def conversions(self):
        conversion = self.sales / self.traffic
        return "%r" % conversion

views.py（def _total_sales（self）：在我的尝试之下）

from django.db.models import Sum

from .models import Traffic, Email


class TrafficListView(ListView):
    model = Traffic
    template_name = 'dashboard/pages/traffic.html'

    def get_context_data(self, **kwargs):
        context = super(TrafficListView, self).get_context_data(**kwargs)
        return context

    def _total_sales(self):
        return self.objects.aggregate(total_sales=Sum('sales'))

将Django模型中的对象总和显示为模板

0 个答案: