Question

Given django models A and B:

class A(models.Model):
    things = models.ManyToManyField('B')

class B(models.Model):
    score = models.FloatField()
    text = models.CharField(max_length=100)

How do I get a list of A entities ordered by the text of the highest-scoring B in things?

Answer 1

If I understand you correctly, this should do it. list will contain a list of all the objects of model A sorted by the text of each object’s highest scoring thing.

dict = {}
list = []
for a in A.objects.all():
    dict[a] = a.things.all().order_by("-score")[0].text
for k, v in sorted(dict.items(), key=lambda x: x[1]):
    list.append(k)

There might be a prettier way to write it, but I can’t think of one off the top of my head…