获取DRF中多个模态类的上次插入时间

from django.db.models import Max
from django.utils import timezone

from myapp.models import Model1, Model2, Model3

def get_last_insert_times():
    last_insert_times = {}
    
    last_insert_times['Model1'] = Model1.objects.aggregate(last_insert_time=Max('created_at'))['last_insert_time']
    last_insert_times['Model2'] = Model2.objects.aggregate(last_insert_time=Max('created_at'))['last_insert_time']
    last_insert_times['Model3'] = Model3.objects.aggregate(last_insert_time=Max('created_at'))['last_insert_time']
    
    return last_insert_times

def my_view(request):
    last_insert_times = get_last_insert_times()
    
    # 使用获取到的上次插入时间进行后续操作
    # ...