您需要执行另一个查询以获取平均值，并将其附加到视图中或模型中的 category_list ：

You need to do another query to get average values and attach them to category_list, either in view or in model:

# in view
category_list = Category.objects.annotate(suma = Sum('operation__value'))
one_year_ago_avg = dict(Category.objects.filter(operation__date__gte = year_ago).annotate(avg = Avg('operation__value')).values_list('pk', 'avg'))
for cat in category_list:
    cat.one_year_ago_avg = one_year_ago_avg.get(cat.pk)


# or in model
class Category(models.Model):
    def one_year_ago_avg(self):
        year_ago = ...
        return self.operation_set.filter(date__gte=year_ago).aggregate(Avg('value')).values()[0]

然后使用 {{ca tegory.one_year_ago_avg}} 在模板中