在Django中每天更新模型的所有实例

from django.db import models

class YourModel(models.Model):
    # 模型字段定义
    last_updated = models.DateTimeField(auto_now=True)

from django.core.management.base import BaseCommand
from your_app.models import YourModel
from datetime import datetime, timedelta

class Command(BaseCommand):
    help = 'Updates all instances of YourModel every day'

    def handle(self, *args, **options):
        # 获取当前时间
        now = datetime.now()

        # 计算前一天的时间
        previous_day = now - timedelta(days=1)

        # 获取需要更新的模型实例列表
        instances = YourModel.objects.filter(last_updated__lt=previous_day)

        # 更新模型实例
        for instance in instances:
            # 更新操作
            instance.save()

        self.stdout.write(self.style.SUCCESS('Successfully updated all instances of YourModel'))

python manage.py update_models