我正在尝试选择表中的项目列表,并将其分配给新表。我可以选择并显示查询集,但它不会更新到数据库中。也许代码中有一些错误。表单将被保存,但对象列表不会被保存。追溯已附加。查询集未保存到数据库中。这与外键值有关吗?赞赏一些建议或替代方案
Models.py
class BidItem(models.Model):
bid = models.ForeignKey(Bid, related_name='bids', on_delete=models.CASCADE)
order= models.ForeignKey(Order, on_delete=models.CASCADE)
product = models.ForeignKey(Product, on_delete=models.CASCADE)
price = models.DecimalField(max_digits=10, decimal_places=2)
quantity = models.ForeignKey(OrderItem, on_delete=models.CASCADE)
def __str__(self):
return str(self.id)
def bid_price(self):
return self.price * self.quantity
Views.py
def bid_list(request):
"""Place bids"""
selected = request.POST.getlist('vendorbid')
selected_orders = OrderItem.objects.filter(pk__in=selected)
if request.method == 'POST':
form = BidListForm(request.POST)
if form.is_valid():
bid = form.save()
for item in selected_orders:
BidItem.objects.create(bid=bid,
order = item['order.id'],
product=item['product'],
price=item['price'],
quantity=item['quantity'])
return render(request,'bids/bid_placed.html')
else:
return render(request, 'bids/bid_list.html', {'selected_orders': selected_orders, 'form': form})
else:
form = BidListForm()
orders = OrderItem.objects.all()
return render(request, 'bids/bid_list.html', {'form': form, 'orders': orders})
错误和回溯
我得到的错误是:/ bids / bid_list /中的TypeError'OrderItem'对象不可下标
我终于解决了,因为有外键,我不得不相应地更改变量:
这是views.py中已解决的部分,供任何参考:
Views.py编辑部分
BidItem.objects.create(bid=bid,
order=item.order,
product=item.product,
price=item.price,
quantity_id=item.quantity)