(Django - Python) timedelta 保存形式的问题

Question

我的拍卖网站有问题，因为当我发布拍卖时，函数没有正确保存我的变量，这些是我的代码：

views.py

import datetime
from datetime import timedelta

def publishAuction(request):

  user=request.user

  form = auctionForm(request.POST, request.FILES)

  if request.method=="POST":

      if form.is_valid():

          auction=form.save(commit=False)
          auction.advertiser=user
          auction.startDate=datetime.datetime.now()
          auction.endDate=auction.startDate+timedelta(days=1)
          auction.endPrice=request.POST.get("startPrice")
          auction.save()
          return redirect("../")

      else:

          form=auctionForm()

models.py

class Auction(models.Model):

  advertiser = models.ForeignKey(User, on_delete=models.CASCADE, related_name='auction_advertiser', null=True)
  winner = models.ForeignKey(User, on_delete=models.CASCADE, related_name='auction_winner', null=True)
  title = models.CharField(max_length=30)
  text = models.TextField()
  startPrice = models.FloatField(null=True)
  endPrice = models.FloatField()
  status = models.BooleanField(default=True)
  image = models.ImageField(upload_to='images/')
  startDate = models.DateTimeField(auto_now=False, auto_now_add=True)
  endDate = models.DateTimeField(auto_now=False, auto_now_add=True)

发布已正确完成，除 endDate 之外的所有内容始终等于 startDate...

我也尝试过使用 datetime.datetime.now 而不是 auction.startDate 或 datetime.timedelta(days=1) 但是当我得到 shell 中的值时总是一样的...

在 scratch.py 文件中我写了相同的代码并且它有效，我不知道为什么在函数中不起作用... :S

谢谢大家！

Answer 1

您已在 endDate 字段上定义了 auto_now_add=True，这使得字段不可编辑并设置为 now()。来自 documentation:

Automatically set the field to now when the object is first created. Useful for creation of timestamps. Note that the current date is always used; it’s not just a default value that you can override. So even if you set a value for this field when creating the object, it will be ignored.

(Django - Python) timedelta 保存形式的问题

(Django - Python) Problems with timedelta saving form

python

django

datetime

save

timedelta