Django 中缺少“中位数”聚合函数

在Django中缺少“中位数”聚合函数？

python
from django.db import models
from django.db.models import Count
class MyModel(models.Model):
    value = models.IntegerField()
# 使用原生的SQL查询计算中位数
def calculate_median():
    # 执行原生的SQL查询
    query = '''
        SELECT value
        FROM myapp_mymodel
        ORDER BY value
        OFFSET (SELECT COUNT(*) FROM myapp_mymodel) / 2
        LIMIT 1
    '''
    result = MyModel.objects.raw(query)
    
    # 获取中位数
    median = result[0].value if result else None
    
    return median