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[英]How to increment a serial number in Django model with order by created_at
[英]How can I filter and update my Django model with created_at
我有兩個模型
class Records(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
Approved = models.BooleanField(default=False)
Date = models.DateTimeField(default=datetime.now, blank=True)
class Request(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
Approved = models.BooleanField(default=False)
Date = models.DateTimeField(default=datetime.now, blank=True)
如果Request
中的Approved
為True
,我希望 cron 每 1 分鍾更新一次Record
我試過這個...
def user_request():
if Request.objects.exists():
check=Request.objects.get()
with transaction.atomic():
if check.Approved == True:
Records.objects.filter(user=check.user, Date=check.Date).update(Approved=True)
Request.objects.get().delete()
我不明白為什么當這兩個 model object 同時創建時,即使我確認日期時間,日期、分鍾和秒是相同的,這個邏輯也不起作用。
您需要指定要更新的Request
。
def user_request(req):
req_id = req.id
with transaction.atomic():
if req.Approved:
record = Records.objects.filter(user=check.user)
record.update(Approved=True)
req.delete()
return req_id
user_request
方法需要針對每個請求 object 運行。
您的 CRON 作業示例:
from datetime import datetime
...
today_requests = Request.objects.filter(Date=datetime.today())
updated_requests = [user_request(req) for req in today_requests]
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