按天计算事件？

Question

我需要做一个按天计算约会的计数视图，例如，如果 6 月 20 日有 4 个约会，6 月 21 日有 3 个约会。如果我在 6 月 20 日登录，它只会显示 4 个约会。

这是我目前的观点，但没有奏效

models.py

class Appointment(models.Model):
  appointment_date = models.DateField(null=True)
  appointment_time = models.TimeField(null=True)
  patient = models.ForeignKey('Patient', on_delete=models.CASCADE)
  reseptionist = models.ForeignKey('Reseptionist', on_delete=models.SET_NULL, blank=True, null=True)
  service = models.ForeignKey('Service', on_delete=models.CASCADE)
  physician = models.ForeignKey('Physician', on_delete=models.CASCADE)

views.py

def count_appointment(request):
  appointment = Appointment.objects.filter(appointment_date__day=datetime.today().day).count()
  data = {}
  data['appointment'] = appointment
  return render(request, 'index.html', context=data)

index.html

 {{appointment}}

Answer 1

你可以这样做，

from datetime import date
def count_appointment(request):
  appointments = Appointment.objects.filter(appointment_date=date.today())
  return render(request, 'index.html', context={'appointments': appointments.count()})

在模板中，

{{appointments}}

Answer 2

您可以使用以下方式过滤：

from datetime import date

def count_appointment(request):
  appointment = Appointment.objects.filter(appointment_date=date.today()).count()
  data = {
    'appointment': appointment
  }
  return render(request, 'index.html', context=data)

这里是appointment 约会的号码。所以你渲染这个：

{{ <b>appointment</b> }}

如果要检索指定的QuerySet，则应删除.count()：

from datetime import date

def count_appointment(request):
  appointments = Appointment.objects.filter(appointment_date=date.today())
  data = {
    'appointments': appointments
  }
  return render(request, 'index.html', context=data)

然后你枚举appointsments:

Number of appointments: {{ appointments|length }}
{% for appointment in appointments %}
    {{ appointment }}
{% endfor %}