如何在Django中对带重复参数的条件表达式求和

from django.db.models import Sum, F, Q, Case, When

result = YourModel.objects.filter(YourCondition).aggregate(
    total_sum=Sum(
        Case(
            When(YourCondition, then=F('your_field')),
            default=0,
            output_field=models.IntegerField()
        )
    )
)

total_sum = result['total_sum']