Django orm get latest for each group

Question

I am using Django 1.6 with Mysql.

I have these models:

class Student(models.Model):
     username = models.CharField(max_length=200, unique = True)

         


        

Answer 1

This should work on Django 1.2+ and MySQL:

Score.objects.annotate(
  max_date=Max('student__score__date')
).filter(
  date=F('max_date')
)