你可以总结一下,所以:
from django.db.models import Count, Sum
MyModel.objects.annotate(total_m2m=Count('my_m2m')).aggregate(
total=Sum('total_m2m')
)
但在这里,立即汇总更有意义:
from django.db.models import Count
MyModel.objects.aggregate(
total=Count('my_m2m')
)