Annotate a sum of two fields multiplied

Question

I have three models, simplified for the example:

class Customer(models.Model):
    email = models.CharField(max_length=128)

class Order(models.Model):
    custo         


        

Answer 1

You'll probably need to roll out your own custom aggregator. You can find a simple walk through of a GROUP_CONCAT example that should get you started here: http://harkablog.com/inside-the-django-orm-aggregates.html