Home/ Questions/Q 1101823
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-17T01:05:28+00:00

class Order(models.Model): … class OrderItem(models.Model) order = models.ForeignKey(Order) product = models.ForeignKey(Product) quantity = models.PositiveIntegerField()

  • 0
class Order(models.Model):
    ...

class OrderItem(models.Model)
    order = models.ForeignKey(Order)
    product = models.ForeignKey(Product)
    quantity = models.PositiveIntegerField()

What I need to do is to get the Order(s) which has only one order item. How can I write it using the QuerySet objects (without writing SQL)?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The easiest way to do this would be to use the Count aggregation:

    from django.db.models import Count
Order.objects.annotate(count = Count('orderitem__id')).filter(count = 1)
    • 0