Django -跨数据库删除最近创建的对象

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'db1',
        'USER': 'user1',
        'PASSWORD': 'password1',
        'HOST': 'localhost',
        'PORT': '5432',
    },
    'db2': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'db2',
        'USER': 'user2',
        'PASSWORD': 'password2',
        'HOST': 'localhost',
        'PORT': '5432',
    }
}

from django.db import models

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'my_model'

from django.utils import timezone
from myapp.models import MyModel

# 获取当前时间之前的对象
cutoff_time = timezone.now() - timezone.timedelta(days=1)

# 在db2中删除最近创建的对象
MyModel.objects.using('db2').filter(created_at__gt=cutoff_time).order_by('-created_at').delete()